Fourth Element Men's Xerotherm XT 250 Top


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The Xerotherm is the ultimate base layer for use under a drysuit. Made from Polartec® Powerstretch®, originally developed for NASA, the Xerotherm traps a layer of air - a much better insulator than water - next to the skin, keeping the wearer drier and more comfortable.

It can be worn under a padded base layer or on its own under a pressed neoprene drysuit, providing amazing warmth without being bulky.

Warm: the Xerotherm is the ultimate base layer system for drysuit diving. It can be used either on its own under pressed neoprene or under a Thinsulate to increase the diver's existing thermal protection.

Lightweight: the Xerotherm is made from Polartec Power Stretch, which has been used on several Everest expeditions, and is the most effective garment lying directly against the skin to provide warmth and comfort in demanding environmental conditions.

Fast moisture wicking: the Xerotherm is made from the fastest moisture wicking fabric available. Moisture is transported away from the skin. Air, which is a far better insulator, is kept at the surface of the skin. This drastically reduces heat loss from the body.

Four-way stretch and versatility: worn under membrane suits as a base layer under existing thermal protection, the Xerotherm greatly improves the diver's warmth and comfort.
Under crumpled wetsuits, the Xerotherm's low volume and high thermal performance provides excellent protection without restricting movement.

Design features:

  • flat seams throughout for maximum comfort against the skin
  • Thumb loops on the top prevent the sleeves from riding up

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Fourth Element Men's Xerotherm  XT 250 Top

Fourth Element Men's Xerotherm XT 250 Top

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