Open Box Dive Fins — Propulsion at a Discount

Fins are close to ideal for open box buying. They're moulded from rubber or composite with no electronics, no soft parts that perish, and no service requirement. A scuff on a blade has no effect on how a fin moves water. What comes back is almost always a sizing issue or a diver deciding they wanted a different blade style.

This collection covers open heel, full foot, split, paddle, and technical fins from Scubapro, Mares, Apeks, Atomic Aquatics, TUSA, Hollis, OMS, and others. Every item is inspected and graded before listing; see Product Conditions for full definitions.

Open Heel or Full Foot?

Open heel fins are worn with dive boots and adjust via strap or spring, making them the standard for cold water, shore entries over rock, and any diving where you want foot protection. Full foot fins are worn barefoot, are lighter and more compact for travel, and suit warm-water boat diving.

This distinction drives sizing. Open heel fins are sized to the boot, not your foot — and a fin that fits over a 3mm bootie may be too small over a 7mm one or a rigid drysuit boot. Buy for the thickest boot you'll actually dive.

Blade Styles

• Paddle — a single continuous blade; powerful, precise, and the standard for technical diving and frog kicking
• Split — divides down the centre; easier on the legs with a fast flutter kick, less effective for frog kick and precise manoeuvring
• Vented — channels reduce drag on the recovery stroke while maintaining thrust on the power stroke
• Technical — stiff and negatively buoyant, built to hold horizontal trim with a drysuit and steel plate

What to Check Before Ordering

• Straps included and intact. Bungee and spring straps are the most common wear point. They're replaceable, but confirm what's included.
• Foot pocket condition. Check the condition note for cracking at the flex points, particularly on older rubber fins.
• Blade rigidity. Heavily used composite blades can soften over years. Open Box and Like New grades won't have this issue.
• Modular components. Some technical fins use interchangeable blades or weight plates — confirm all parts are present.

Why Buy Open Box Dive Fins from DiveCatalog.com?

• Inspected and graded — condition stated clearly on every listing
• Full range — recreational, travel, and technical fins across major brands
• Expert sizing advice — tell us your boot and we'll help you size the fin correctly
• Fast shipping — in-stock items ship within one business day
• 30-day returns — with RMA approval; see our Returns & Exchanges page
• Rewards program — earn points on every purchase

Frequently Asked Questions

How do I size open heel fins?

Size to your dive boot, not your shoe size. Boot thickness varies considerably — a 3mm bootie and a rigid drysuit boot are very different volumes. If you dive both, size for the bulkier one and take up the slack with strap adjustment.

Are used fins reliable?

Yes. Fins have no serviceable components and no soft parts that perish with age. Inspect the foot pocket for cracking at flex points and confirm the straps are sound, and a used fin will perform like a new one.

Split or paddle blades?

Split fins reduce leg effort with a fast flutter kick and suit divers who find paddle fins tiring. Paddle fins give better precision and are necessary for the frog kick used in technical and cave diving. If you're diving overhead environments or want maximum control, paddle.

Can I replace worn fin straps?

Yes, and it's inexpensive. Spring straps and bungee straps are widely available and many divers upgrade standard rubber straps to springs regardless of condition.

Do open box fins come with a warranty?

No. Open box and used products are not eligible for manufacturer warranty coverage.

Browse the full collection above, or see all Open Box & Used gear.