For long-lasting resistance to the penetrating cold up among the peaks, these mountaineering mitts conserve all the reliable heat of natural duck down at very high altitudes. The natural down has been given a waterproof K DRY™ DOWN coating to hold up to the constant humidity in extreme conditions, with a PRIMALOFT® fleece finish inside, to round off the thermal protection. Extremely lightweight and compressible, these EXPEDITION DOWN MITTENS deliver intense warmth and preserve the thermal integrity of your extremities on both ascents and descents. Their PERTEX® RIPSTOP shell is woven to prevent snagging and tearing. These natural down mittens have very long adjustable cuffs for maximum protection and have very flexible leather reinforcement on the palms for better grip on your ice axe.