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Best Wetsuits for Boating: Thickness, Cut and Fit

A well-chosen wetsuit keeps you warm and moving. It comes down to the right thickness for the water temperature, the cut and a snug fit.

By The BarcoEquipado Team Updated on 4 min read

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Our top 3 picks

Stock checked on October 6, 2026
Top ratedZCCO Men's Wetsuits 1.5/3mm Premium Neoprene Back Zip Shorty…
ZCCO Men's Wetsuits 1.5/3mm Premium Neoprene Back Zip Shorty… 8.6 BarcoEquipado score: 8.6 out of 10 See price
Best sellerZCCO Men's Wetsuits 1.5/3mm Premium Neoprene Back Zip Shorty…
ZCCO Men's Wetsuits 1.5/3mm Premium Neoprene Back Zip Shorty… 8.6 BarcoEquipado score: 8.6 out of 10 See price
Best valueHevto Men Wetsuit 3/2mm Neoprene Front Zipper for Surfing Diving
Hevto Men Wetsuit 3/2mm Neoprene Front Zipper for Surfing Diving 8.6 BarcoEquipado score: 8.6 out of 10 See price

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How to choose a wetsuit for water activities

A wetsuit doesn't keep water out: it lets in a thin layer that your body warms and the suit holds in place. So the most important factor isn't thickness, it's a snug fit with no gaps. A thick but loose suit lets cold water flush through and loses most of its value.

Start by defining the use: dinghy sailing or windsurfing, paddleboarding, kayaking, snorkeling, or riding in an inflatable boat. Falling in now and then is very different from being in the water for an hour.

Thickness by water temperature

Thickness is given in millimeters, for example 3/2: 3 mm in the torso and 2 mm in the arms and legs. Use this table as a starting point; your cold tolerance and the wind will do the rest.

Water temperatureRecommended suit
Above 72 °F (22 °C)Rash guard or 1-2 mm shorty
65-72 °F (18-22 °C)2-3 mm full suit
57-65 °F (14-18 °C)3/2 mm full suit
50-57 °F (10-14 °C)4/3 mm full suit with hood and booties
Below 50 °F (10 °C)5/4 mm or drysuit

Tip: wind chill hits harder than the water itself. If your activity involves spray and breeze, go up one thickness or add a windproof layer on top.

Suit types and cuts

  • Full suit (steamer): covers arms and legs. The most versatile choice for cool seasons.
  • Shorty: short sleeves and legs. Great for summer and activities where you rarely get wet, like paddleboarding.
  • Long John / Farmer John: sleeveless, leaving your arms completely free. Popular for kayaking and dinghy sailing.
  • Drysuit: truly keeps water out thanks to sealed zippers and gaskets. For very cold water or long immersions, and it takes practice.

Back-zip or chest-zip

The back zip is the most common and easiest to get into; chest-zip suits reduce water entry and work well for sailing. Zipperless suits are very flexible but harder to put on.

Seams and materials

Seams change both comfort and price:

  • Flatlock: flat stitching, comfortable but lets water through. Fine for warm water.
  • Glued and blind-stitched (GBS): more watertight, the standard for cool water.
  • Taped or liquid-sealed: the most watertight and durable, typical of high-end suits.

As for materials, limestone-based neoprene is more flexible and lighter than petroleum-based neoprene, and thermal fleece linings dry faster. A nylon or jersey outer protects against abrasion and wears longer.

Getting the size right

Measure your height, weight, chest, waist and hips and compare them with the manufacturer's size chart, because sizing varies between brands. When you try it on, check that:

  1. There are no air pockets in the armpits, lower back or knees.
  2. The neck doesn't choke you or let water in.
  3. You can move your arms without the suit pulling at the shoulders.
  4. It feels slightly tight when dry: neoprene loosens a little once wet.

Watch out: a wetsuit is not a life jacket and doesn't replace safety gear. If you're on a boat, always wear a USCG-approved life jacket.

Care for years of use

  • Rinse the suit with fresh water after every use, inside and out.
  • Hang it inside out by the waist or on a wide hanger, never by the shoulders or in direct sun.
  • Don't put it in the washer or dry it with heat: it breaks the neoprene down.
  • If it starts to smell, use a wetsuit-specific cleaner.
  • Fix small cuts with neoprene cement before they grow.

If you also want to explore underwater, see our picks for snorkeling gear.

Frequently asked questions

What thickness of wetsuit do I need?+

It depends on the water: about 2-3 mm for mild water (65-72 °F), 3/2 mm between 57 and 65 °F, and 4/3 mm below 57 °F. Wind and the time you spend wet also matter.

How should a wetsuit fit?+

Snug like a second skin, with no wrinkles or air pockets in the armpits, knees or back, but without restricting movement. If it's loose, water circulates and you lose heat.

Can I use the same wetsuit for sailing and paddleboarding?+

Yes, a 3/2 mm full suit works for both. For summer paddleboarding a shorty may be enough; for dinghy sailing a Long John gives your arms more freedom.

How do I wash a wetsuit?+

Rinse it with fresh water after every use and let it dry inside out, in the shade, on a wide hanger. Avoid the washing machine, direct sun and harsh detergents.

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Our pick

ZCCO Men's Wetsuits 1.5/3mm Premium Neoprene Back Zip Shorty…

See price