For minimalist touring while hiking and trekking, or for Alpine touring and mountaineering: the PTX Bivibag I by Salewa provides the necessary weather protection in a Bivouac but is also incredibly comfortable. Its upper material is made of highly breathable Powertex material to ensure a more comfortable inside climate. Various seams on this Bivy sack are welded, so any potential weak spots are done away with. The PTX Biwibag I has a hood that can be tensioned on rocks or trees which offers plenty of space and can also be used as a replacement for a much heavier tent. The bivy sack has a signal whistle in case of an emergency very useful addition! Alpine touring, trekking or mountaineering: the Salewa PTX Bivibag I by Salewa is a reliable Bivy sack for planned as well as spontaneous nights outdoors!