Hollis has released a new line of thermal underwear to keep you warm and toasty underwater.

Hollis’s Advanced Undergarment (AUG) Layering System features three different garments: theAUG BASEAUG 260 and AUG 450“They are designed to be used together at the divers preference and provide the stretch to complement our proprietary drysuit material for the ultimate freedom of movement,” according to the company.

All three are machine washable and can be layered as well as mixed and matched depending on the dive conditions.

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The AUG Base, starting at US$69.95 and comprised of fast-wicking PolyPro fabric, is designed as a base layer that draws moisture away from the body, and comes in men’s (S – XXXL) and women’s (4 – 18) sizes.

The AUG 260, starting at US$109.95, can be worn either as a stand-alone undergarment or combined with either the AUG Base or even the AUG450, depending on the water temperature and type of drysuit used. Available in unisex sizes (S – 3XL), it’s made of a 260-gram combination of plush brushed polyester fleece and spandex.

The AUG 450, starting at US$139.95, is a thicker, “dual-layered” 450-gram technical fleece undergarment, can be used under all types of drysuits and comes in men’s (S – XXXL) and women’s (4 – 18) sizes.

Hollis also has gear for the diver’s head and tootsies, with a one-size-fits-most beanie (no price available) featuring a single-layer, 260-gram stretch fabric. The AUG 260 socks, priced at US$17.95, feature the same thickness as the beanie, can be layered with other socks and come in sizes SM/MD, LG/XL, and XXL.