Insulated Underlayers

Lavacore Men's Long Sleeve Shirt

23 reviews

SKU: LVCSLSMLR

^$129.95

+ wishlist

In Stock

DESCRIPTION

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

Pros

High quality
Effective buoyancy
Provides warmth
Recommended by dive instructors
Comfortable fit

Lavacore Men's Full Suit

20 reviews

SKU: LVCMLR

^$249.95

+ wishlist

In Stock

DESCRIPTION

A technically advanced fullsuit made with Lavacore fabric for thermal control and superior comfort.

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.

NeoSport 1.5mm Xspan Unisex Pants

18 reviews

SKU: NSPPPLR

~~$119.95~~ Save: $21 (18%)

^$98.95

+ wishlist

In Stock

DESCRIPTION

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

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.

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 Back Zipper Full Jumpsuit, Men's

16 reviews

SKU: LVCJBMLR

^$249.95

+ wishlist

In Stock

DESCRIPTION

A male full jumpsuit with soft fleece inner layer, 4-way stretch, and overlap flat lock stitch.

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 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 Vest

14 reviews

SKU: LVCVMML

^$99.95

+ wishlist

In Stock

DESCRIPTION

A neutrally buoyant men's vest with antibacterial fleece lining for warmth and odor control.

NeoSport 1.5mm Xspan Women's Long Sleeve Top

13 reviews

SKU: NSPPLSSW12

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

^$77.95

+ 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 Women's Vest

11 reviews

SKU: LVCVW4

^$99.95

+ wishlist

In Stock

DESCRIPTION

A female-specific scuba vest with antibacterial fleece and 4-way stretch for comfort and flexibility.

Lavacore Men's Hooded Vest

10 reviews

SKU: LVCHVTMML

^$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 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 Shorts Unisex

8 reviews

SKU: LVCSML

^$99.95

+ wishlist

In Stock

DESCRIPTION

A technically advanced unisex shorts made of synthetic fabric with windproof and thermal control features.

Lavacore Pants Unisex

7 reviews

SKU: LVCP2XL

^$139.95

+ wishlist

In Stock

DESCRIPTION

A unisex pants with antibacterial fleece, 4-way stretch, breathable layer, and neutral buoyancy.

Scubapro 1mm Hybrid Thermal Men's Long Sleeve Top

5 reviews

SKU: SCPHTTLMXL

^$115

+ wishlist

In Stock

DESCRIPTION

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

Lavacore Back Zipper Full Jumpsuit, Women's

5 reviews

SKU: LVCJBW10

^$249.95

+ wishlist

In Stock

DESCRIPTION

A black women's full jumpsuit with Polytherm Tri-Laminate for thermal control, flexibility, and UPF 50+ protection.

Scubapro 1.5mm Everflex Men's Long Sleeve Top

4 reviews

SKU: SCPE1LSMBK2X

^$219

+ wishlist

In Stock

DESCRIPTION

A high-stretch, water-repellant neoprene top for male scuba divers with fleece and plush lining for warmth and comfort.

Sharkskin Titanium 2 Women's Pant

4 reviews

SKU: SHST2PW10

~~$259.99~~ Save: $68 (26%)

^$191.99

+ wishlist

In Stock

DESCRIPTION

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

Sharkskin Titanium 2 Men's Front Zip Long Sleeve Top

3 reviews

SKU: SHST2LM2X

~~$299.99~~ Save: $76 (25%)

^$223.99

+ wishlist

In Stock

DESCRIPTION

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

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.

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.

Sharkskin Titanium 2 Women's Front Zip Long Sleeve Top

2 reviews

SKU: SHST2LW12

~~$299.99~~ Save: $76 (25%)

^$223.99

+ wishlist

In Stock

DESCRIPTION

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

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Insulated Underlayers

As the days begin to shorten and the water takes on that familiar autumn chill, divers, snorkelers, and water sports enthusiasts start to think more carefully about staying warm beneath the surface. Insulated underlayers are an essential part of any cold-water kit, providing the comfort and thermal protection needed to extend dive times, enhance enjoyment, and ensure safety in cooler conditions. These specialized garments are designed to be worn under wetsuits or drysuits, forming a crucial barrier that traps and retains body heat while still allowing for the freedom of movement so vital to underwater exploration. Whether you’re gearing up for a brisk September morning boat dive, planning a series of repetitive dives on a liveaboard, or simply hoping to make the most of shoulder season snorkeling trips, a well-chosen insulated underlayer can make all the difference between shivering through your adventure and savoring every moment.

Selecting the right insulated underlayer involves considering a range of factors, from water temperature and dive duration to personal cold tolerance and the type of exposure suit you’ll be wearing. Some divers run warm, while others start to feel the chill after just a short time in the water; knowing your own preferences and physiology is key. Insulated underlayers come in a variety of materials, each with its own strengths: fleece is popular for its softness and breathability, while advanced synthetics offer impressive moisture management and quick-drying properties. For drysuit divers, layering is especially important, as the air trapped between layers acts as additional insulation. Snorkelers and freedivers may opt for thinner, more flexible options that can be worn comfortably beneath a wetsuit without restricting movement. These garments aren’t just for the hardcore or technical diver, either—they make thoughtful gifts for anyone who enjoys water sports, from the avid winter swimmer to the casual paddleboarder who wants to extend their season. Imagine gifting a set of insulated underlayers to a friend who’s just discovered the magic of kelp forests or to a family member who loves exploring local lakes well into the fall; it’s a present that’s both practical and deeply appreciated.

Beyond warmth, insulated underlayers contribute to overall comfort and dive safety. By helping to regulate body temperature, they reduce the risk of hypothermia and allow divers to focus on the underwater world rather than on the creeping cold. Many experienced divers recall the difference a good underlayer made on their first truly chilly dive—how it let them linger longer at depth, explore new sites, or simply enjoy the camaraderie of a surface interval without teeth chattering. For those planning travel to cooler destinations or hoping to maximize their time in the water as September transitions to autumn, investing in quality underlayers is a smart move. If you’re interested in exploring the full range of options available, including different materials, thicknesses, and styles, you can find a comprehensive selection on our Insulated Undergarments page. Whether you’re preparing for a new season of diving or searching for the perfect gift for the water lover in your life, insulated underlayers are a staple that deliver warmth, comfort, and confidence beneath the waves.