One Piece Base Layers

When it comes to exploring the underwater world, having the right gear is essential. Whether you're a scuba diver or a snorkeler, one-piece base layers are a must-have addition to your underwater sports wardrobe. These versatile garments provide a comfortable and flexible layer of protection against the elements, making your diving or snorkeling experience even more enjoyable. Designed with durability and functionality in mind, one-piece base layers offer superior moisture-wicking properties and thermal insulation to keep you warm and dry during your underwater adventures. With a range of styles and designs available, finding the perfect one-piece base layer to suit your needs is easier than ever.

Henderson 3mm Thermoprene Men's John Wetsuit

13 reviews

SKU: HNDT3MJXL

~~$211.99~~ Save: $42.40 (20%)

^$169.59

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In Stock

DESCRIPTION

A high-quality 3mm Thermoprene men's wetsuit with 75% more stretch, glued & sewn seams, and spine & lumbar pads.

NeoSport Unisex Sports Skin Suit

651 reviews

SKU: BLRLMXLYL

~~$69.95~~ Save: $10 (14%)

^$59.95

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In Stock

DESCRIPTION

A form-fitting unisex spandex skin suit for scuba and snorkeling, with internal key pocket and defense against irritants.

Pros

Durable and well-made
Good value for the price
Easy to put on and take off
Provides protection and prevents sunburn
Quick-drying and lightweight

Cressi Demon Rash Guard with Chest Pad

4 reviews

SKU: CSBDRGGRXL

^$59.95

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In Stock

DESCRIPTION

A mimetic-colored rash guard with chest pad, designed for spearfishing, providing protection and camouflage.

Sharkskin Titanium 2 Men's Chest Zip Full Suit

1 reviews

SKU: SHSTCZMMD

~~$749.99~~ Save: $150 (20%)

^$599.99

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In Stock

DESCRIPTION

A 5mm neoprene full suit with titanium nanoparticle technology for thermal protection and extra warmth.

Sharkskin Titanium 2 Men's Front Zip Full Suit with Hood and Socks Package

1 reviews

SKU: PCKSHSTCUM

~~$739.97~~ Save: $74 (10%)

^$665.97

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In Stock

DESCRIPTION

A 5mm Sharkskin Titanium 2 men's full suit with hood and socks package for thermal protection in waters down to 68 degrees F.

Scubapro 0.5mm Sport Men's Full Wetsuit

SKU: SCPSF05MXL

^$189

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In Stock

DESCRIPTION

A comfortable and stretchable 0.5mm full wetsuit for men, perfect for pool, warm dives, and layering.

Fourth Element Arctic Women's One Piece

SKU: FRTAW1PWXL

~~$499~~ Save: $100.03 (20%)

^$398.97

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In Stock

DESCRIPTION

An eco-friendly, high-insulation polyester one-piece with front zip, hand warmer pockets, and advanced thermal protection.

Fourth Element Arctic Men's One Piece

SKU: FRTAM1PXLS

~~$499~~ Save: $100.03 (20%)

^$398.97

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In Stock

DESCRIPTION

An eco-friendly, insulated one-piece suit with recycled polyester, front zip, and hand warmer pockets for ultimate warmth.

Mares Men's Rash Guard Trilastic Shorts

61 reviews

SKU: MRSMRGTSLR

^$49.95

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In Stock

DESCRIPTION

A protective and versatile pair of Trilastic shorts for men, ideal for scuba, snorkeling, and water sports.

Pros

Versatile and can be used for various water activities
High quality and well made
Quick-drying and lightweight
Comfortable and supportive
Works well under wetsuit

Cressi Skin 1mm Suit

33 reviews

SKU: CSBS1NLRBKPK

^$69.95

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In Stock

DESCRIPTION

A 1mm nylon neoprene suit with a long front zipper, heel stirrup straps, and thumb loops for reduced drag and UV protection.

Pros

Extra warmth
Quick delivery
Suitable for snorkeling
Good fit
Helps with wetsuit

Henderson Polyolefin Jumpsuit

20 reviews

SKU: HNDPJBKXL

^$185.99

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In Stock

DESCRIPTION

A durable and versatile polyolefin jumpsuit with spine pad, offering protection, warmth, and comfort.

Pros

Versatile
Lightweight and buoyant
Durable and comfortable
Ease of donning and doffing wetsuit
Great for warmer water diving

O'Neill Thermo X Long Sleeve Rash Guard

17 reviews

SKU: ONLTXLT2XL

^$71.95

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In Stock

DESCRIPTION

A men's rash guard with 4-way stretch fabric, low bulk insulation, and quick-dry properties for water sports.

Scubapro UPF 50 Steamer for Women

9 reviews

SKU: SCPUSWGYMD

^$129

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In Stock

DESCRIPTION

A Scubapro UPF 50 Steamer for Women offers head-to-toe protection with UPF 50 and prevents ride-up with thumb loops and foot stirrups.

Lavacore by Oceanic Men's Long Sleeve Hooded Shirt

9 reviews

SKU: LVCHSM2XL

^$159.95

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In Stock

DESCRIPTION

A men's hooded shirt made of Lavacore fabric, providing thermal insulation and SPF 50+ sun protection.

Waterproof R30 Long Sleeve Rash-Guard, Men's

2 reviews

SKU: WPGR3LM23X

^$91.30

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In Stock

DESCRIPTION

A long sleeve rash-guard made of spandex, perfect for scuba diving and providing increased warmth under a wet-suit.

Sharkskin Titanium 2 Men's Front Zip Full Suit

1 reviews

SKU: SHSTCUM4X

~~$599.99~~ Save: $120 (20%)

^$479.99

+ wishlist

In Stock

DESCRIPTION

A 5mm neoprene full suit with titanium nanoparticles for maximum thermal protection and moisture-wicking properties.

Cressi 2.5mm Core Vest Base Layer for Women

SKU: CSB25BVWLR

^$94.95

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In Stock

DESCRIPTION

A 2.5mm neoprene vest for women that enhances warmth and comfort during scuba diving.

Bare Aqua Trek 1 Tech Men's Drysuit

SKU: BREAQ1BMMLBK

^$1679.95

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In Stock

DESCRIPTION

A black Cordura Nylon drysuit with Ultrawarmth Base Layers, offering flexibility, durability, and thermal energy.

Fourth Element J2 Women's Shorts

SKU: FRTJ2SWM

^$99

+ wishlist

In Stock

DESCRIPTION

A sustainable and comfortable base layer shorts for women, designed for prolonged comfort and thermal performance.

Waterproof Body 2X Bottom, Men's Undergarment Open Box

SKU: WPGBD2XBM3OB

~~$198~~ Save: $59.40 (30%)

^$138.60

+ wishlist

In Stock

DESCRIPTION

A black fleece undergarment for men, offering superior warmth, moisture-wicking, and flexibility for cold water dives.

Sharkskin Titanium 2 Women's Front Zip Full Suit

SKU: SHSTCUW6

~~$599.99~~ Save: $120 (20%)

^$479.99

+ wishlist

In Stock

DESCRIPTION

A 5mm neoprene women's full suit with titanium nanoparticles for maximum thermal protection and moisture-wicking properties.

Cressi 2.5mm Core Vest Base Layer for Men

SKU: CSB25BVM3X

^$89.95

+ wishlist

In Stock

DESCRIPTION

A 2.5mm neoprene vest for men, enhancing warmth and comfort under wetsuits during dives.

Bare Polar Stretch Mid Layer Men's Full Suit

SKU: BREMSBLM

^$439.95

+ wishlist

In Stock

DESCRIPTION

A black polyester-spandex full suit featuring 4-way stretch fleece, quick-dry technology, and a convenient front zipper.

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One Piece Base Layers

When you’re spending hours in, on, or around the water, comfort and protection become more than just luxuries—they’re essentials. One piece base layers are a foundational piece of gear for divers, snorkelers, surfers, and water sports enthusiasts who want to make the most of every aquatic adventure. These versatile suits serve as a second skin beneath wetsuits or drysuits, providing an extra layer of warmth that can make all the difference during early spring dives when the water still holds winter’s chill. March is a transitional month, and whether you’re prepping for the first open-water dives of the year or planning a tropical getaway, a one piece base layer helps regulate body temperature, wicks moisture away, and reduces chafing from your outer exposure suit. Many divers recall their first cold-water plunge and the sharp sting of icy water sneaking past their wetsuit—an experience that’s easily avoided with the right base layer. The snug, flexible fit allows for unrestricted movement, so you can focus on the reef, wreck, or wildlife rather than your own discomfort.

Beyond thermal protection, one piece base layers are valued for their ability to make donning and doffing wetsuits and drysuits much easier, especially after a long day in the sun or saltwater. The smooth fabric glides against your skin, reducing friction and helping to prevent irritation from seams and zippers. For frequent travelers and liveaboard divers, a base layer doubles as a practical item for lounging between dives or as a sun-safe garment when you’re topside. They’re also a thoughtful gift for anyone just getting started in scuba diving or water sports—think of the new diver who’s eager to join you on early morning boat trips, or the avid snorkeler who wants to extend their time in cooler water. Even experienced divers appreciate the comfort and versatility a quality base layer brings to their kit, especially when water temperatures can fluctuate from one dive site to the next. If you’re shopping for a loved one, consider their preferred activities and destinations—a base layer is a gift that shows you care about their safety and enjoyment.

Choosing the right one piece base layer involves considering factors like material thickness, breathability, and fit. Lightweight options are perfect for layering under snug wetsuits in moderate climates, while thicker, fleece-lined versions offer extra insulation for cold-water expeditions. Look for features such as flatlock stitching to minimize chafing, quick-dry fabrics for convenience, and stretch panels for enhanced mobility. Many suits are designed to be unisex, but for women seeking a tailored fit, our dedicated selection of Women's Base Layers ensures comfort and performance are never compromised. Whether you’re prepping for a spring dive trip, gearing up for a new season of underwater exploration, or searching for the perfect gift for the water lover in your life, a one piece base layer is an investment in warmth, protection, and all-day comfort. With the right base layer, you’ll be ready to embrace every adventure the water has to offer—no matter the season or conditions.