Fourth Element X-Core Undersuit

archive – Gear News

Fourth Element X-Core Undersuit

Emerging research from DAN and other sources is beginning to show the possibility of physiological problems when using “active body-heating systems”, says Fourth Element, so it has developed a product designed to maximise the retention of body heat and describes it as its alternative to electrically heated vests.

Weight for weight, it reckons the X-Core is its “warmest undergarment ever”, designed to be worn next to the skin under an Arctic, Arctic Expedition, Halo 3D or other undersuit. It uses Repreve fibre, made from recycled post-consumer waste including used plastic bottles, and the all-way-stretch fabric is said to give a snug fit. There are no sleeves to bulk up around the arms and constrict movement. The X-Core comes in men’s sizes XS-XXXL and women’s sizes 8-20 and costs £99.

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