Petzl's high performance Hirundos Harness serves you best on hard climbs and in the alpine. FuseFrame technology uses thermo formed foam to give you an incredibly slim, superlight, and surprisingly comfortable ride. Like the waist, Petzl's DoubleBack HD buckle comes in a slim style to minimize bulk. Elastic leg loops with flexible attachments allow full mobility for stemming, heel hooking, and high stepping. Because the Hirundos is Petzl's high end harness, Petzl reinforced the tie in loops for long lasting durability. This harness has two rigid side gear loops and two flexible rear gear loops that collapse when paired with a backpack. CariTool ice tool holders and a rear loop for a haul rope ready you with plenty of gear on the longest alpine routes.