{"title":"Technical Fins","description":"\u003csection id=\"technical-fins\"\u003e\n\u003ch1 style=\"font-size: 22px\"\u003eTechnical Fins — Negative Buoyancy, Frog Kick, and Drysuit Boot Pockets\u003c\/h1\u003e\n\n\u003cp\u003eTechnical fins are heavier than recreational fins, and that's the point. A diver in a drysuit with steel backplate and doubles has significant buoyancy in the legs from trapped suit gas — negatively buoyant fins counteract it and hold horizontal trim. That trim is what makes a proper frog kick possible, and the frog kick is what lets a diver move through a silty cave or wreck without destroying visibility for everyone behind them. A soft, positively buoyant recreational blade cannot do this job regardless of how efficient it is in open water.\u003c\/p\u003e\n\n\u003cp\u003eThe other requirement is the foot pocket. Rigid drysuit boots and rock boots are considerably bulkier than neoprene booties, so technical fins use oversized pockets and spring or heavy-duty bungee straps that donn and doff reliably with cold hands and thick gloves. At DiveCatalog.com, we carry these as an authorized dealer for every brand represented.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size: 20px\"\u003eThe Technical Fin Range\u003c\/h2\u003e\n\n\u003ch3 style=\"font-size: 17px\"\u003eApeks RK3 HD\u003c\/h3\u003e\n\u003cp\u003eHigh-density material makes the RK3 HD stiffer and negatively buoyant — the classic technical profile. Rugged thermoplastic rubber construction handles genuine abuse, and the oversized foot pocket accommodates drysuit boots comfortably. A spring strap handles quick donning and doffing. Versatile enough for warm water with wetsuit boots or pebbled beach entries in a drysuit with rigid dry boots. Available in Small, Medium, Large, and Super.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 17px\"\u003eScubapro S-Tek Modular System\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eS-Tek Pro Blade Modular Fin System\u003c\/strong\u003e is built from Monprene® with an ultra-slim profile and a 30° pre-angled blade requiring less flex to generate forward thrust. The Hydra-Loop system uses a reinforced blade angle for lateral stiffness, giving stable alternating kicks and improved thrust from the hydrofoil profile. A removable Stainless Steel Plate Weight System lets you tune the fin to positive, neutral, or negative buoyancy — genuinely useful when switching between drysuit and wetsuit configurations. Compatible with Seawing Supernova liners.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eS-Tek Open Heel Fin\u003c\/strong\u003e uses the same Monprene construction with a Clean Water Blade and vented design that reduces drag while increasing thrust. Two-piece construction with blade and foot pocket molded separately, joined by a Sure-Lock Connecting System for assembly and transport. The open heel pocket includes an upgraded heavy-duty bungee strap with micro-adjustments for different boot types, plus the same removable steel weight plate system.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 17px\"\u003eHollis F1 and F2\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eF1 Heavy Duty\u003c\/strong\u003e is Hollis's rugged technical fin — a powerful blade with construction built for durability and efficiency, with an open-heel design sized for diving boots. The \u003cstrong\u003eF1 LT Vented Blade\u003c\/strong\u003e is the lightweight variant, using a SEBS compound molded into a vented blade for hydrodynamic kicking with less mass, suited to divers who want F1 characteristics without the full weight.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eF2 Heavy Duty\u003c\/strong\u003e uses a patented design that adds blade surface on both the downstroke and the upstroke, improving efficiency across any kick style. High-grade monoprene construction, angled strap mounts for better power transfer, spring heel straps with an easy-grip heel tab, and a generous foot pocket in Small, Regular, and XL.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 17px\"\u003eMares Power Plana Tec XR\u003c\/h3\u003e\n\u003cp\u003eEngineered specifically for cave and technical diving. Molded from high-quality natural rubber with reinforced side ribs and purposefully negatively buoyant to balance drysuits and steel backplates. Built to support diverse kick styles with precise control and dependable trim.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 17px\"\u003eOMS SlipStream Monoprene\u003c\/h3\u003e\n\u003cp\u003eMonoprene construction balancing flexibility and propulsion efficiency, suited to the kick styles technical divers rely on — particularly the frog kick favoured in cave and overhead environments.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size: 20px\"\u003eKey Technical Fin Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNegative buoyancy:\u003c\/strong\u003e Counteracts the buoyant legs that come with a drysuit, holding horizontal trim rather than letting the feet float upward. The single most important difference from recreational fins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlade stiffness:\u003c\/strong\u003e A stiff blade transmits the short, precise pulses of a frog kick or helicopter turn. Soft blades flex and mush these movements into imprecision.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOversized foot pockets:\u003c\/strong\u003e Sized for rigid drysuit boots and rock boots, which are substantially bulkier than neoprene booties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring and bungee straps:\u003c\/strong\u003e No buckles to adjust or break, and donning works with cold hands and thick gloves. Spring straps also can't slip loose mid-dive the way ratcheting buckles occasionally do.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVented blades:\u003c\/strong\u003e Reduce drag on the recovery stroke while maintaining thrust on the power stroke.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModular and weighted systems:\u003c\/strong\u003e Removable weight plates let a single fin be tuned positive, neutral, or negative across different exposure suits and configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-piece construction:\u003c\/strong\u003e Blade and foot pocket separate for packing, and allow blade swaps without replacing the whole fin.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size: 20px\"\u003eChoosing Your Technical Fins\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eDiver Type\u003c\/th\u003e\n\u003cth\u003eRecommended Fin\u003c\/th\u003e\n\u003cth\u003eKey Reason\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrysuit and doubles divers wanting a proven standard\u003c\/td\u003e\n\u003ctd\u003eApeks RK3 HD\u003c\/td\u003e\n\u003ctd\u003eNegatively buoyant, stiff, oversized drysuit boot pocket, spring strap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCave and technical divers wanting maximum trim control\u003c\/td\u003e\n\u003ctd\u003eMares Power Plana Tec XR\u003c\/td\u003e\n\u003ctd\u003ePurpose-built for cave; negatively buoyant to balance steel backplates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDivers switching between drysuit and wetsuit\u003c\/td\u003e\n\u003ctd\u003eScubapro S-Tek (either model)\u003c\/td\u003e\n\u003ctd\u003eRemovable steel weight plates tune buoyancy positive, neutral, or negative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDivers wanting efficiency on both kick strokes\u003c\/td\u003e\n\u003ctd\u003eHollis F2 Heavy Duty\u003c\/td\u003e\n\u003ctd\u003ePatented design adds blade surface on downstroke and upstroke\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDivers wanting technical characteristics with less mass\u003c\/td\u003e\n\u003ctd\u003eHollis F1 LT\u003c\/td\u003e\n\u003ctd\u003eLightweight SEBS vented blade; easier on travel weight allowances\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrog kick and overhead environment specialists\u003c\/td\u003e\n\u003ctd\u003eOMS SlipStream Monoprene\u003c\/td\u003e\n\u003ctd\u003eMonoprene flex profile suited to frog kick and precise maneuvering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2 style=\"font-size: 20px\"\u003eMaintenance \u0026amp; Care\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRinse in fresh water after every saltwater dive, paying attention to spring strap ends and the foot pocket interior where sand collects.\u003c\/li\u003e\n\u003cli\u003eInspect spring straps for corrosion at the crimps and bungee straps for fraying or loss of elasticity before each dive.\u003c\/li\u003e\n\u003cli\u003eCheck that heel tabs are intact — a torn tab makes doffing genuinely difficult with cold hands.\u003c\/li\u003e\n\u003cli\u003eOn modular systems, verify the connecting mechanism is fully locked after assembly and before entering the water.\u003c\/li\u003e\n\u003cli\u003eStore flat or hanging rather than standing on the blade tips, which causes permanent deformation over time.\u003c\/li\u003e\n\u003cli\u003eKeep rubber fins out of direct sunlight; UV degrades natural rubber and thermoplastic compounds over time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size: 20px\"\u003eWhy Buy Technical Fins from DiveCatalog.com?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthorized dealer\u003c\/strong\u003e for Apeks, Scubapro, Hollis, Mares, and OMS — genuine products, full manufacturer warranty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrysuit-compatible sizing advice\u003c\/strong\u003e — our team can help you size foot pockets for rigid dry boots and rock boots\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast shipping\u003c\/strong\u003e — in-stock items ship within one business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy returns\u003c\/strong\u003e — if sizing isn't right, exchanges are straightforward\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRewards program\u003c\/strong\u003e — earn points on every purchase\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size: 20px\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3 style=\"font-size: 17px\"\u003eWhy are technical fins negatively buoyant?\u003c\/h3\u003e\n\u003cp\u003eA drysuit traps gas that migrates toward the feet, and a steel backplate adds weight at the torso — the combination tends to tip a diver feet-up. Negatively buoyant fins counteract that, holding a horizontal position. Horizontal trim is what makes the frog kick and helicopter turn possible, and those kicks are what let a diver move through silt without destroying visibility.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 17px\"\u003eCan I use technical fins for recreational diving?\u003c\/h3\u003e\n\u003cp\u003eYes, though there are trade-offs. They're heavier to travel with and negative buoyancy is less useful in a thin wetsuit — you may find your legs sit lower than you'd like. Modular systems with removable weight plates, like the Scubapro S-Tek, solve this directly by letting you remove weight for wetsuit diving and add it back for drysuit dives.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 17px\"\u003eHow do I size a fin for drysuit boots?\u003c\/h3\u003e\n\u003cp\u003eSize to the boot, not to your shoe size. Rigid drysuit boots and rock boots are substantially bulkier than neoprene booties, and a fin that fits over a 5mm bootie will often be too small over a dry boot. If you dive both configurations, size to the bulkier one and use the strap adjustment to take up slack. Contact us with your specific boot and we'll advise.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 17px\"\u003eSpring straps or bungee straps — does it matter?\u003c\/h3\u003e\n\u003cp\u003eBoth eliminate buckles, which is the main point — nothing to adjust with cold hands, nothing to break, and no risk of a ratchet slipping loose mid-dive. Spring straps are more durable long-term; heavy-duty bungee straps, like those on the S-Tek, offer micro-adjustment to fine-tune fit across different boot types.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 17px\"\u003eWhat is a frog kick and why do these fins suit it?\u003c\/h3\u003e\n\u003cp\u003eThe frog kick propels the diver with a horizontal outward-then-inward sweep of the fins, directing water backward rather than downward. This avoids stirring silt from the bottom — essential in caves and wrecks. It requires a stiff blade to transmit the precise, deliberate movement, and horizontal trim to execute properly, which is exactly what stiff negatively buoyant fins provide.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size: 17px\"\u003eWhat does the modular system on the Scubapro S-Tek actually do?\u003c\/h3\u003e\n\u003cp\u003eBlade and foot pocket are molded separately and join via the Sure-Lock Connecting System. That means the fin breaks down for packing, blades can be swapped for different conditions, and a damaged component can be replaced without buying a complete new pair. The removable stainless steel weight plate is what allows buoyancy tuning across configurations.\u003c\/p\u003e\n\n\u003cp\u003eBrowse the full technical fin collection above and reach out if you'd like help sizing for drysuit boots or choosing a fin for your configuration.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"hollis-f1-lt-vented-blade-open-heel-scuba-diving-fin","title":"Hollis F1 LT Vented Blade Open Heel Scuba Diving Fin","description":"\u003cp\u003eThe Hollis F1 LT Vented Blade Open Heel Fin is a lightweight option designed for scuba diving gear that emphasizes practical performance in both open-water and confined environments. Crafted from a lightweight SEBS compound and molded into a vented blade, it supports hydrodynamic kicking and smooth propulsion through the water. The open-heel design accommodates adjustable wear for a secure, comfortable fit during diving sessions.\u003c\/p\u003e \u003cp\u003eKey features support reliable diving performance: \u003c\/p\u003e","brand":"Hollis","offers":[{"title":"Gray \/ REG (Regular)","offer_id":40426521624776,"sku":"214.2201.005","price":199.95,"currency_code":"USD","in_stock":true},{"title":"Gray \/ XL (X-Large)","offer_id":40329715220680,"sku":"214.2201.006","price":199.95,"currency_code":"USD","in_stock":true},{"title":"Gray \/ 2XL (2X-Large)","offer_id":40329715253448,"sku":"214.2201.007","price":199.95,"currency_code":"USD","in_stock":true},{"title":"WHITE \/ REG (Regular)","offer_id":40426515988680,"sku":"214.2211.005","price":199.95,"currency_code":"USD","in_stock":true},{"title":"WHITE \/ XL (X-Large)","offer_id":40329715318984,"sku":"214.2211.006","price":199.95,"currency_code":"USD","in_stock":true},{"title":"WHITE \/ 2XL (2X-Large)","offer_id":40329715351752,"sku":"214.2211.007","price":199.95,"currency_code":"USD","in_stock":true},{"title":"YELLOW \/ REG (Regular)","offer_id":32179746570336,"sku":"214.2207.005","price":199.95,"currency_code":"USD","in_stock":true},{"title":"YELLOW \/ XL (X-Large)","offer_id":40329715155144,"sku":"214.2207.006","price":199.95,"currency_code":"USD","in_stock":true},{"title":"YELLOW \/ 2XL (2X-Large)","offer_id":40329715187912,"sku":"214.2207.007","price":199.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/3810\/0851\/products\/open-box-hollis-f1-lt-vented-blade-open-heel-scuba-diving-fin-reg-yellow-3.jpg?v=1743759130"},{"product_id":"hollis-f2-heavy-duty-open-heel-suba-diving-fin","title":"Hollis F2 Heavy Duty Open Heel Scuba Diving Fin","description":"\u003cp\u003eHollis F2 Heavy Duty Open Heel Scuba Diving Fin is designed to improve your power-to-weight ratio for divers who travel light or prefer a lighter fin. The patented F2 design adds blade surface on both the downstroke and upstroke to increase efficiency with any kick, making it a reliable piece of scuba gear for diving in varied conditions.\u003c\/p\u003e\u003cp\u003eConstructed from high-grade monoprene, these fins balance durability with practical performance for scuba diving in saltwater and freshwater environments. The open-heel design includes angled strap mounts for comfort and a better transition of power, while spring heel straps with an easy-grip heel tab simplify setup. The generous foot pocket is offered in Small, Regular, and XL to accommodate a range of boot sizes.\u003c\/p\u003e","brand":"Hollis","offers":[{"title":"REG (Regular)","offer_id":35993940263080,"sku":"214.2300.005","price":159.95,"currency_code":"USD","in_stock":true},{"title":"S (Small)","offer_id":40329725739208,"sku":"214.2300.002","price":149.95,"currency_code":"USD","in_stock":false},{"title":"XL (X-Large)","offer_id":40329725804744,"sku":"214.2300.006","price":159.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/3810\/0851\/products\/hollis-f2-heavy-duty-open-heel-scuba-diving-fin-reg.jpg?v=1743745513"},{"product_id":"hollis-f1-heavy-duty-open-heel-technical-diving-fin","title":"Hollis F1 Heavy Duty Open Heel Technical Diving Fin","description":"\u003cp\u003eThe Hollis F1 Heavy Duty Open Heel Technical Diving Fin delivers reliable propulsion for scuba and diving gear, blending a powerful blade with rugged construction. It emphasizes durability and efficiency, ensuring smooth movement and long-term performance under demanding conditions. The open-heel design provides a secure fit when paired with diving boots and standard scuba gear, making it a versatile choice for technical diving and recreational diving alike.\u003c\/p\u003e","brand":"Hollis","offers":[{"title":"REG (Regular)","offer_id":40329712959688,"sku":"214.2200.005","price":199.95,"currency_code":"USD","in_stock":true},{"title":"XL (X-Large)","offer_id":36062720393384,"sku":"214.2200.006","price":199.95,"currency_code":"USD","in_stock":true},{"title":"2XL (2X-Large)","offer_id":40329712992456,"sku":"214.2200.007","price":199.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/3810\/0851\/products\/hollis-f1-heavy-duty-open-heel-technical-diving-fin-reg.jpg?v=1743745578"},{"product_id":"scubapro-s-tek-pro-blade-modular-fin-system","title":"Scubapro S-Tek Pro Blade Modular Fin System","description":"\u003cp\u003eSCUBAPRO's S-Tek Pro Blade Modular Fin System is a next-generation scuba fin designed for technical diving. Built from durable Monprene® for strength in demanding underwater environments, it features an ultra-slim profile and a 30° pre-angled blade that requires less flex to generate forward thrust, supporting improved efficiency during dives. This gear is designed to perform reliably in challenging underwater conditions while staying comfortable over a full diving session.\u003c\/p\u003e \u003cp\u003eThe Hydra-Loop system with an increased and reinforced blade angle enhances lateral stiffness for stable alternating kicking and improved thrust thanks to the hydrofoil profile. A removable Stainless Steel Plate Weight System lets you tune buoyancy to suit your dive conditions, offering positive, neutral, or negative buoyancy fins. Compatibility with Seawing Supernova liners enables versatile customization across various diving missions, and the package includes essential components for field use and transport.\u003c\/p\u003e","brand":"Scubapro","offers":[{"title":"Black \/ XS\/M (X-Small \/ Medium)","offer_id":44033817542877,"sku":"25.501.001","price":139.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ L\/XL (Large \/ X-Large)","offer_id":44033817575645,"sku":"25.501.002","price":139.0,"currency_code":"USD","in_stock":false},{"title":"Orange \/ XS\/M (X-Small \/ Medium)","offer_id":45532022964445,"sku":"25.502.001","price":139.0,"currency_code":"USD","in_stock":true},{"title":"Orange \/ L\/XL (Large \/ X-Large)","offer_id":45532023849181,"sku":"25.502.002","price":139.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/3810\/0851\/products\/scubapro-s-tek-pro-blade-modular-fin-system-black-xs-m.jpg?v=1743755868"},{"product_id":"scubapro-s-tek-open-heel-fin","title":"Scubapro S-TEK Open Heel Diving Fin","description":"\u003cp\u003eSCUBAPRO S-Tek Open Heel Fin delivers power and durability for challenging scuba and technical diving scenarios. Built from robust Monprene material, this fin resists wear in demanding underwater environments and is a solid choice for scuba gear. The Clean Water Blade and vented blade design reduces drag and increases thrust, supporting efficient propulsion across varied currents and depths.\u003c\/p\u003e\u003cp\u003eIts Hydra-Loop ramped and reinforced leading edge improves lateral rigidity for improved alternate kicks, and creates a hydrofoil profile for better thrust, enhancing underwater performance in demanding dives.\u003c\/p\u003e\u003cp\u003eA removable stainless steel weight plate system lets you choose between a positively buoyant, neutrally buoyant, or negatively buoyant fin, enabling tailored buoyancy to suit your dive plan and boot setup.\u003c\/p\u003e\u003cp\u003eDesigned for transport and fit, the S-Tek Fin features a two-piece construction with blade and foot pocket molded separately, plus a durable Sure-Lock Connecting System for easy assembly and disassembly. 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