Ideal for attending to today's skis that have a wide range of tail shapes, the STS System features a one-touch, easy-to-tension camming tailpiece with a tough, stretchy elastomer strap that provides 10 cm of length adjustment for use with multiple pairs of skis. Ascension skins feature durable, hydrophobic construction and offer tremendous durability and climbing security. Black Diamond's reversible tip loop fits a wide range of skis. Tip Loop Sizes: Small: Skins 50–70 mm Medium: Skins 80–100 mm Large: Skins 110–130 mm 580 g Weight: 1 lb 4 oz per pair (90 mm)