Choosing fins: full foot, open heel and what fits in a suitcase

Fins are the piece of snorkelling kit people most often buy twice: once on holiday because they forgot them, and once properly afterwards. Getting it right the first time is mostly about being honest about where you will actually swim.

Full foot or open heel

Full-foot fins slip onto a bare foot like a shoe. They are lighter, cheaper, pack smaller and are the normal choice for warm-water surface snorkelling. Open-heel fins have an adjustable strap and are worn over a neoprene boot, which protects the foot on rocky entries and suits colder water.

For most people snorkelling from a beach or a boat in warm water, full foot is the correct answer, and the simpler one.

Blade length and what it costs you

A longer blade moves more water per kick, which means more speed for fewer kicks. It also loads the calves and ankles considerably more, and it is awkward on a ladder and in a suitcase. Long blades belong to freedivers and to people who spend hours covering distance.

Short travel fins give enough thrust for surface swimming, cause far less cramp, and fit in hand luggage. For the way most people snorkel, they are simply better, not a compromise.

Sizing, and the twenty-minute rule

A fin should be snug with no pressure points. If it pinches anywhere while you are standing on a shop floor, it will be painful after twenty minutes of kicking and unbearable after an hour. Loose is equally bad: a fin that moves rubs a blister on the instep within one swim.

Try full-foot fins on bare, dry feet. They will feel slightly easier in water, but not enough to rescue a size that is wrong on land.

Stiffness and how you swim

A stiffer blade rewards a strong, slow kick from the hip. A softer blade suits a quicker, gentler cadence and is more forgiving for beginners and for children. Most recreational fins sit deliberately in the middle.

If you find your ankles aching after short swims, you are probably on a blade that is too stiff for your kick rather than unfit.

Packing and airline reality

Full-length fins are longer than most cabin bags and awkward in a suitcase, which is why so many people leave them at home. Travel fins in the 55 to 65cm range fit diagonally in a standard case, and split-heel designs pack flatter still.

If a set is going in a suitcase with clothing, put the mask inside a shoe or a hard box. A mask crushed under a fin is the classic arrival-day disappointment.

Sets versus buying separately

A matched set — mask, snorkel and fins in a bag — is straightforward, usually cheaper than the parts, and perfectly good for occasional use. The argument for buying separately is fit: if your face is an awkward shape or your feet are between sizes, the mask or the fins in a set will be a compromise.

Our sets are listed with the individual specifications rather than as a single item, so you can see exactly what is inside before deciding either way.

Looking after them

Rinse in fresh water after every use, including the foot pocket where sand collects. Dry out of direct sun, and store flat rather than standing on the blade tips, which take a permanent bend if left leaning against a wall for a season.

Check the strap and buckle on open-heel fins at the start of each season. Buckles are usually replaceable and are much cheaper than a new pair of fins.

The practical recommendation

For surface snorkelling from a beach or boat, in warm water, packed in a suitcase: short full-foot travel fins in a snug size. For rocky shore entries or cold water: open heel with a boot. Everything else is a refinement on those two. The full range, with lengths and sizes on each listing, is on the shop page.

Kicking technique, briefly

Most fin discomfort is technique rather than equipment. The kick comes from the hip with a fairly straight leg and a relaxed ankle; bending at the knee and pedalling produces a lot of splash and very little forward motion, and it is what makes calves cramp within ten minutes.

Keep the kick slow and wide, keep the fins under the water rather than breaking the surface, and let the blade do the work. Anyone who has spent an afternoon exhausted behind a companion who seems to be doing nothing is watching the difference between a hip kick and a knee kick.

The short version

• Short travel fins are the right choice for surface snorkelling and luggage.
• Full-foot fins go on bare feet; open-heel fins need a boot.
• A fin that pinches on land will be unbearable after twenty minutes in water.
• Longer blades give more thrust and much more calf fatigue.

From our shelves

• Ubekezele Snorkeling Gear for Adults Men Women,4 in 1 Snorkel Set with Panoramic View Diving — $34.99
• Cressi Adult Snorkel Set (Mask, Dry Snorkel, Adjustable Fins) – Light for Travel – Ocean Set: — $69.95
• Cressi Snorkeling Set- Short Adjustable Fins, Silicone Mask, and Dry Snorkel- Compact — $84.95

Where to go next

Browse the full range on the shop page, read the frequently asked questions before ordering, or check delivery timing on the Shipping Policy page. If you would rather ask a person, contact us — the phone reaches the counter.