Glue is extremely effective at keeping your skins attached to your skis, but it's not without its own set of problems. If you're tired of your skins getting stuck together, leaving a sticky residue on your bases, and collecting every bit of dirt and grime they come in contact with, then give the Kohla Vacuum Base 2. 0 Climbing Skins a try. They're made with a glue free adhesive side that won't get stuck together, won't leave your bases sticky, and will overall make transitions a whole lot faster. Their vaccum side is composed of a mohair, nylon blend that glides well and provides the necessary traction to get up steep, switch backed skintracks.