Warm, low bulk, low buoyancy thermal undersuit for drysuits that works even when wet. Available as a full one-piece suit or two-piece, the Arctic is designed to be used as part of a layering system under a trilaminate drysuit. Probably the world's best selling thermal undergarment is now available in a simple one piece option. Featuring the innovative two layer technology pioneered by fourth element, the One Piece Arctic provides a simple solution to the challenges of thermal protection.