Ski skins, an indispensable tool for backcountry skiers and ski tourers, are adhesive-backed, fabric strips that attach to the base of skis to provide grip when ascending steep and slippery slopes. Made from materials like mohair or synthetic nylon, ski skins feature a direction-specific nap that allows them to glide smoothly in one direction while preventing the ski from sliding backward. Their name comes from their historical use of animal hides. Ski skins are a fundamental component of the "skinning" process in ski touring, enabling skiers to climb uphill efficiently with their heels free, and then they can be removed for the exhilarating descent back down the mountain. Skins are essential for conquering challenging backcountry terrain and have become an integral part of the toolkit for those seeking to explore the untouched beauty of the winter wilderness.