Whether we're standing at the bottom of the crag in the late days of fall working with our partner to send the final big project of the season or trekking across rock and ice pushing toward high-alpine summits, the Black Diamond Belay Pant is an essential part of our cold-weather climbing kit. The compressible pants are filled with reliable synthetic insulation that maintains its warmth while wet, and the water-resistant coating does its best to make sure that doesn't happen. The pants are built for climbers, with a harness-compatible design, full-length side zippers that allow us to get them on and off while wearing crampons, and reinforced kickpatches to ensure they don't rip while we stomp our cold feet with the crampons attached.