Insulated Underlayers

Lavacore Men's Long Sleeve Shirt

23 reviews

SKU: LVCSLSM3XL

^$129.95

+ wishlist

In Stock

DESCRIPTION

A neutrally buoyant long sleeve shirt with a soft fleece inner layer for warmth and antibacterial properties.

Pros

High quality
Effective buoyancy
Provides warmth
Versatile use
Comfortable fit

NeoSport 1.5mm Xspan Men's Long Sleeve Top

20 reviews

SKU: NSPPLSSSM

~~$99.95~~ Save: $22 (22%)

^$77.95

+ wishlist

In Stock

DESCRIPTION

A comfortable, ultra-soft men's top with 4-way stretch neoprene for scuba, snorkeling, surfing, and water sports.

Lavacore Bibbed Hood

18 reviews

SKU: LVCHDXS

^$29.95

+ wishlist

In Stock

DESCRIPTION

A neutrally buoyant bibbed hood with antibacterial inner fleece and SPF 30+ sun protection.

NeoSport 1.5mm Xspan Unisex Pants

18 reviews

SKU: NSPPPLR

~~$119.95~~ Save: $20 (17%)

^$99.95

+ wishlist

In Stock

DESCRIPTION

A 1.5mm XSPAN unisex pants with 4-way stretch neoprene, shock-cord waistband, and reinforced seat area.

Lavacore Women's Full Suit

17 reviews

SKU: LVCW12

^$249.95

+ wishlist

In Stock

DESCRIPTION

A female-specific fullsuit with 4-way stretch, antibacterial inner fleece, and soft fleece inner layer for warmth.

O'Neill Thermo X Long Sleeve Rash Guard

17 reviews

SKU: ONLTXLTSM

^$71.95

+ wishlist

In Stock

DESCRIPTION

A high-performance long sleeve rash guard with incredible insulation, low bulk, and quick-dry properties for ultimate comfort and freedom of movement.

Lavacore Women's Long Sleeve Shirt

15 reviews

SKU: LVCSLSW12

^$129.95

+ wishlist

In Stock

DESCRIPTION

A female-specific long sleeve shirt with 4-way stretch, thermal insulation, and a soft fleece inner layer.

Lavacore Men's Short Sleeve Shirt

15 reviews

SKU: LVCSSMXL

^$119.95

+ wishlist

In Stock

DESCRIPTION

A men's short sleeve scuba top with antibacterial fleece, 4-way stretch, and thermal insulation.

Lavacore Men's Vest

14 reviews

SKU: LVCVMLR

^$99.95

+ wishlist

In Stock

DESCRIPTION

A neutrally buoyant men's vest with 4-way stretch, soft fleece inner layer, and antibacterial properties.

NeoSport 1.5mm Xspan Women's Long Sleeve Top

13 reviews

SKU: NSPPLSSW12

~~$99.95~~ Save: $20 (20%)

^$79.95

+ wishlist

In Stock

DESCRIPTION

A stretchy, no-zip long sleeve top for women suitable for scuba, snorkeling, surfing, and water sports.

Lavacore Women's Hooded Vest

11 reviews

SKU: LVCHVTW18

^$129.95

+ wishlist

In Stock

DESCRIPTION

A female-specific hooded vest with antibacterial inner fleece, 4-way stretch, SPF 30+ sun protection, and full gusset underarm.

Lavacore Men's Hooded Vest

11 reviews

SKU: LVCHVTM2XL

^$129.95

+ wishlist

In Stock

DESCRIPTION

A men's hooded vest with antibacterial fleece, 4-way stretch, SPF 30+ sun protection, and full gusset underarm.

Lavacore Women's Vest

11 reviews

SKU: LVCVW20

^$99.95

+ wishlist

In Stock

DESCRIPTION

A female-specific scuba vest with 4-way stretch, antibacterial inner fleece, and thermal insulation for warmth.

Lavacore by Oceanic Men's Long Sleeve Hooded Shirt

9 reviews

SKU: LVCHSM3XL

^$159.95

+ wishlist

In Stock

DESCRIPTION

A men's long sleeve hooded shirt offering thermal control, SPF 50+ protection, and exceptional flexibility.

Lavacore Pants Unisex

7 reviews

SKU: LVCPXLS

^$139.95

+ wishlist

In Stock

DESCRIPTION

A Unisex black pants with 4-way stretch, thermal insulation, and SPF 50+ sun protection.

Scubapro 1mm Hybrid Thermal Men's Long Sleeve Top

5 reviews

SKU: SCPHTTLMXL

^$119

+ wishlist

In Stock

DESCRIPTION

A form-fitting, sleek hydrodynamic men's long sleeve top made of neoprene for thermal insulation.

Sharkskin Titanium 2 Women's Pant

4 reviews

SKU: SHST2PW10

~~$279.99~~ Save: $56 (20%)

^$223.99

+ wishlist

In Stock

DESCRIPTION

A super warm women's pant with embedded titanium nanoparticles, comfy fleece inner layer, and water-repellent nylon/lycra blend.

Bare ExoWear Pants Women's, Black

3 reviews

SKU: BREPW2

^$179.95

+ wishlist

In Stock

DESCRIPTION

A black women's pants with maximum thermal protection, OMNIRED Infrared Technology, and flat seam stitching.

Sharkskin Titanium 2 Men's Front Zip Long Sleeve Top

3 reviews

SKU: SHST2LM2X

~~$299.99~~ Save: $60 (20%)

^$239.99

+ wishlist

In Stock

DESCRIPTION

A men's front zip top with unmatched thermal protection, titanium-infused technology, and luxe inner layer.

Scubapro K2 Extreme Men's Full Suit Undergarment

2 reviews

SKU: SCPK2EFUMMD

^$459

+ wishlist

In Stock

DESCRIPTION

A premium men's undergarment for drysuit diving, the Scubapro K2 Extreme offers superior warmth, protection, and easy wear.

Sharkskin Titanium 2 Women's Front Zip Long Sleeve Top

2 reviews

SKU: SHST2LW12

~~$299.99~~ Save: $60 (20%)

^$239.99

+ wishlist

In Stock

DESCRIPTION

A women's front zip long sleeve top with unmatched thermal protection and titanium-infused technology for supreme heat retention.

Bare Ultrawarmth Base Layer Top for Men

2 reviews

SKU: BREMUWBLTMD

^$124.95

+ wishlist

In Stock

DESCRIPTION

A men's base layer top with OMNIRED infrared technology and advanced stretch-breathable fleece material for ultimate dry suit layering.

Bare Ultrawarmth Base Layer Pants for Men

2 reviews

SKU: BREMUWBLP4XL

^$89.95

+ wishlist

In Stock

DESCRIPTION

A high-performance base layer pant for men with advanced infrared technology and moisture-wicking fabric.

Fourth Element Thermocline Long Sleeve Top Men's

2 reviews

SKU: FRTTLLSMM

^$305

+ wishlist

In Stock

DESCRIPTION

A revolutionary, ocean-positive long sleeve top for men, made with recycled ghost fishing nets and providing thermal insulation.

Sharkskin Titanium 2 Men's Pant

2 reviews

SKU: SHST2PM3X

~~$279.99~~ Save: $56 (20%)

^$223.99

+ wishlist

In Stock

DESCRIPTION

A super warm and agile men's pant with titanium boost, comfy inner hug, and smart thermal control.

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Insulated Underlayers

When it comes to staying comfortable and protected during cold-water dives, early spring snorkeling, or any aquatic adventure where temperatures dip, insulated underlayers are an essential part of your gear. Often referred to as thermal base layers, these garments are designed to be worn next to the skin, forming the foundation of a smart layering system. They work by trapping your body heat while simultaneously wicking away moisture, ensuring you remain warm and dry no matter how challenging the conditions. Whether you’re slipping into a wetsuit for a March dive off the best coast pairings, prepping for a long day of underwater photography, or simply want to extend your season on the water, the right underlayer makes all the difference. Materials like merino wool offer natural temperature regulation and odor resistance, which is perfect for multi-day trips or repeated use, while advanced synthetics such as polyester and polypropylene provide outstanding moisture management and quick-drying properties. Fleece-lined options add an extra layer of insulation, ideal for those who feel the cold more acutely or are planning to be submerged for extended periods.

Insulated underlayers aren’t just for divers, either. They’re a thoughtful gift for anyone who enjoys winter water sports, cold-weather kayaking, or even hiking along blustery coastlines. The versatility of these garments means they transition seamlessly from underwater adventures to topside activities—think layering beneath a drysuit for a brisk morning paddle, or under ski gear for a day on the slopes. Seasoned divers know the value of a reliable base layer: it can mean the difference between a memorable dive and an uncomfortable, chilly experience. If you’re shopping for someone who’s just getting into cold-water diving or a seasoned explorer looking to upgrade their kit, insulated underlayers are a practical and appreciated addition. With options available in various weights and thicknesses, it’s easy to tailor your selection to the specific conditions and personal preferences—lightweight for brisk spring mornings, midweight for fluctuating temperatures, and heavyweight for the coldest environments. Many divers also pair their tops with specialized Insulated Layering Pants for full-body warmth and comfort, ensuring every part of their body is shielded from the chill.

Choosing the right insulated underlayer involves considering not just warmth, but also fit and mobility. A good underlayer should be snug without restricting movement, allowing for a full range of motion whether you’re adjusting your mask, swimming through kelp forests, or maneuvering your fins along a reef. Look for flatlock seams to minimize chafing, and pay attention to features like thumbholes and extended cuffs for added coverage under gloves or wrist seals. For those who spend long hours in the water, a titanium guard woven into the fabric can provide an extra barrier against heat loss, making a noticeable difference on longer dives or in frigid conditions. As we move through March and into the unpredictable weather of early spring, insulated underlayers become even more valuable, offering reliable warmth on days when the water temperature lags behind the air. Whether you’re building your own cold-water kit or searching for a gift that will be used and appreciated for years, these garments are a cornerstone of comfort, safety, and enjoyment in any aquatic or outdoor setting.