As we all know, skis are very smooth on their base, making it kind of tough going uphill with them. That is why there are ski touring skins. Thanks to these, the ski sticks to the snow when walking uphill: In one direction, the skin will go smoothly across the snow, in the other, it will stick to the ground, making a climb up a mountain possible. Once you have reached the top, you take the skins off and ski back down. Touring skins differ in their used material, in how they are fixed onto the ski and whether they are already trimmed to fit your ski or need to be cut.