Aqualung Drysuits — Stay Warm. Dive Longer. Go Further.
Aqualung's relationship with drysuit technology goes back further than most divers realize. Through the La Spirotechnique lineage, the company developed the first modern constant-volume drysuit in 1950 — a decade before recreational scuba diving had properly taken off. That foundation of cold-water engineering continues in the current Fusion drysuit range, which represents some of the most innovative drysuit design available today, including patented technology that has no equivalent in the industry.
The defining innovation in the current lineup is the Fusion Dual Layer System — a patented design that separates the waterproofing function from the fit function into two independent layers. The inner AirCore layer provides the 100% waterproof barrier in a loosely cut fit that accommodates a range of body types and works with any undergarment. The outer skin layer conforms to the diver's body shape for a streamlined, low-drag profile and can be detached via the RapidZip system for quick drying between dives. This is fundamentally different from traditional single-layer drysuits.
At DiveCatalog.com, we carry the Aqualung Fusion drysuit range and the Alaskan trilaminate drysuit, along with the EVO4 drysuit boot. DiveCatalog.com is an authorized Aqualung dealer — every drysuit carries the full manufacturer warranty.
Understanding the Fusion System
The Dual Layer System
Traditional drysuits are a single layer of material that must simultaneously provide waterproofing, fit, and durability — these requirements often conflict. Aqualung's Fusion separates them: the inner AirCore layer handles waterproofing without needing to fit precisely (it's cut with deliberate excess to accommodate different body shapes and undergarment thicknesses), while the outer skin layer handles fit and durability without needing to be waterproof. The result is a suit that offers both a custom-like fit and genuine waterproof reliability.
AirCore Inner Layer
The AirCore inner layer uses a breathable 3-ply fabric that lets water vapor from perspiration pass outward while keeping external water out. This moisture management helps prevent the clammy, sweaty feeling that affects many single-layer drysuits during surface intervals and extended dives. The AirCore also distributes air more evenly inside the suit, which helps with buoyancy management and trim.
RapidZip System
The outer layer attaches to the AirCore via the RapidZip system, which allows quick detachment for drying between dives or changing the outer skin style. The outer layer dries much faster when removed — particularly useful for multi-dive days or liveaboard trips where you need the suit ready again quickly.
Seal Lock Technology (SLT)
The Fusion Sport and higher models use Aqualung's modular seal replacement system. Neck and wrist seals can be swapped in the field in minutes without tools or adhesive — if a seal tears, you don't need to end your trip or find a drysuit repair shop. Hypoallergenic silicone seals are standard, providing 40% more stretch than latex and better resistance to UV and ozone degradation.
Front Entry and YKK Brass Dry Zipper
All Fusion drysuits use front entry with a military-grade YKK brass dry zipper — allowing self-entry without assistance from a buddy. Front-entry positioning is also generally more comfortable during extended surface periods than back-entry suits.
The Aqualung Drysuit Range
Fusion Sport with AirCore — The Travel Drysuit
The Fusion Sport is specifically designed for travel divers. The complete dual-layer system — AirCore inner plus Spandex outer — packs small enough to fit in carry-on luggage. The Spandex outer skin is the lightest and fastest-drying outer layer in the Fusion lineup, making it ideal for divers who fly frequently. AirMesh suspenders with a compression-resistant 3D backpad provide support and insulation. An interior zippered pocket and adjustable webbing straps complete the package. Comes with duffel bag, inflator hose, and seal replacement tool as standard.
Alaskan Trilaminate Drysuit — Cold Water Durability
The Alaskan is Aqualung's traditional trilaminate drysuit — a multilayer material construction containing butyl synthetic rubber for waterproofing and elasticity. Trilaminate suits are favoured for their durability in demanding environments and their compatibility with heavy undergarments for extreme cold water diving. Available in Black in sizes S through XL.
Who Are Aqualung Drysuits For?
| Diver Type |
Recommended Drysuit |
Key Reason |
| Travel drysuit divers |
Fusion Sport |
Packs into carry-on; fast-drying outer; complete dual-layer system |
| Cold-water recreational divers |
Fusion Sport or Alaskan |
Both suited to regular cold-water diving; Fusion easier to maintain |
| Extreme cold / professional divers |
Alaskan Trilaminate |
Maximum durability; heavy undergarment compatibility; trilaminate construction |
| New drysuit divers |
Fusion Sport |
Forgiving fit due to loose inner layer; Seal Lock makes seal management easy |
Drysuit Diving Basics
Drysuit diving requires specific training — how you add and remove air from the suit for buoyancy control is different from wetsuit diving, and the consequences of a flooded suit or seal failure require practiced responses. We strongly recommend completing a recognized drysuit diving course (PADI, SSI, NAUI, TDI, etc.) before diving a drysuit for the first time.
The right undergarment makes a significant difference to warmth and comfort in a drysuit. Aqualung's Thermal Fusion underwear was tested and approved by the Canadian Sport Innovation Centre as the top-performing diving underwear for thermal and body protection — it pairs naturally with any Aqualung drysuit. Contact us for undergarment recommendations based on your water temperature.
Why Buy Aqualung Drysuits from DiveCatalog.com?
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Authorized Aqualung dealer — full manufacturer warranty, genuine products
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Expert drysuit advice — our staff can help you choose the right suit and undergarment
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EVO4 drysuit boots also available — compatible military-style lace-up boot in our Boots collection
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Financing available — spread the cost of a premium Fusion system
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Fast shipping — in-stock items ship within one business day
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Rewards program — earn points on every purchase
Frequently Asked Questions — Aqualung Drysuits
Do I need training to dive a drysuit?
Yes. Drysuit diving requires specific skills for buoyancy control, emergency procedures (flooding, valve failures), and safe seal management. We strongly recommend completing a recognized drysuit diving specialty course before your first dives in a drysuit.
What is the Dual Layer System and why is it better than a traditional drysuit?
Traditional drysuits use one layer that must simultaneously waterproof, fit well, and be durable — requirements that often conflict. The Fusion Dual Layer separates these: the inner AirCore layer handles waterproofing without needing to fit precisely, and the outer skin handles fit and durability without needing to be waterproof. This allows each layer to be optimized independently, resulting in a suit that fits better, manages moisture better, and is easier to maintain.
Can I replace the seals myself on the Fusion Sport?
Yes. The Fusion Sport uses Aqualung's Seal Lock Technology (SLT), which allows neck and wrist seal replacement in the field in minutes without tools or adhesive. Extra seals fit in a dive bag — if a seal fails on a dive trip, you can replace it and continue diving.
What undergarment should I use with a drysuit?
The right undergarment depends on water temperature. For moderately cold water (10–15°C), a mid-weight fleece undersuit is typically sufficient. For colder water, a thicker compressed neoprene or layered system is needed. Aqualung's Thermal Fusion underwear is approved by the Canadian Sport Innovation Centre as the top-rated diving undersuit for thermal performance. Contact us for a specific recommendation.
What is the difference between the Fusion Sport and the Alaskan?
The Fusion Sport uses Aqualung's patented dual-layer system with an AirCore breathable inner and Spandex outer — lighter, more packable, and with field-replaceable silicone seals. The Alaskan is a traditional single-layer trilaminate construction using butyl rubber — more durable in abrasive environments, compatible with heavier undergarments, and better suited to extreme cold or professional use. Both are genuine drysuits; the Fusion is more travel-friendly and maintenance-accessible.
What boots work with the Aqualung Fusion drysuits?
The Aqualung EVO4 dry suit boot is designed specifically for compatibility with the Fusion drysuit range. It uses a military-style paracord lace-up design for a secure fit. Sold separately in our Boots collection.
Cold water shouldn't limit your diving. The Aqualung Fusion system opens up the full range of dive conditions year-round. Browse the drysuit collection above and reach out if you'd like help selecting the right suit, undergarment, and boot combination for your diving.
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