The Kinetic Alpine Stretch Bib uses a 3-layer Pertex® Shield shell rated to 30,000mm of waterproofing and 25,000 g/m² of breathability, so it holds up to a storm on the descent without trapping heat on the climb. A fully articulated, stretch-built cut moves through a full stride on steep skin tracks and winter ascents. Harness-compatible thigh pockets and a front dump pocket keep gear reachable without breaking stride, and an integrated RECCO® reflector adds a passive layer of safety in the backcountry. What Our Gearhead® Experts Are Saying:"I skinned up in wind that would've soaked a lesser shell and never had to stop to vent. Pertex Shield breathed enough on the climb that I skied the descent in a dry base layer instead of a damp one."