Mountaineering as a sport that has many pokey things that it requires you to bring along. Petzl is keeping your other non-pokey things safe in your pack with this ultralight pouch. Weighing in at mere 52 grams and measuring 15"x13" (38x33cm) you can easily stow your crampons without a big weight penalty. Plus, at that size you have something for under your butt should you need to wait for your more encumbered partners. Made from a composite X-Pac material and using a clever hole on the top flap that will accept a carabiner for closure or hanging. This ultralight pouch has a multitude of uses that makes itself handy for mountaineering.