As the pinnacle of our backcountry outerwear kits, the Backcountry Cardiac Gore - Tex 3L Bibs find an ideal balance between lightweight breathability and durable coverage so we don't overheat on big ascents or get soaked on the way back down. The Pfas - free Gore - Tex 3 - layer membrane, along with a face fabric blend, provides this balance so we can surf pow, catch air, and send big cliffs to our heart's content, while zippered thigh vents allow us to dump excess heat on tough ascents.