XP II PLUS The XP II Plus is a bivy with a pole bend that keeps the face free. Thanks to GORE-TEX® ARID LITE AIR technology, a unique three-layer laminate, it is completely waterproof and extremely breathable. Loops on the underside allow for the integration of a sleeping pad for added comfort and protection from the cold. BIWACES & BIWAC TENTS A bivouac may be necessary if you can’t find room for a tent or have to involuntarily spend the night outside. That is: a bivy sack can be essential for survival! We offer models that we consistently manufacture from the best materials, GORE-TEX® Gas Permeable Technology is a unique three-layer laminate: completely waterproof and extremely breathable. Unlike the GORE-TEX® membrane used for clothing, GORE-TEX® Gas Permeable Technology is air permeable. Our bivy sacks and tents can therefore be completely closed – absolute weather protection with plenty of comfort!