TRACTION // Proprietary Kling-On Rock(TM) outsole delivers lightweight, flexible performance with solid grip on dry and wet rock. Optional Xtra-Bite carbide screw-in cleats (purchased separately) available for added traction.Closure System // BOAA(R) M4 Fit System with Sequence lacing configuration for quick on/off and a custom fit. Durability // Exo-Tec(TM) technology provides 360 degrees of molded abrasion-resistant protection in a flexible, hyper-light package. Fast Drying // Hydrophobic materials = faster dry times which lessen the chance of spreading invasive species. Internal Drainage // Water flows through internal channels then out midsole ports, quickly removing excess water and weight. Fit // A unique stretch wrap cuff offers supreme comfort and agile flexibility. Specs // 8.5" Height / 2.6 lbs. per pair Sizes // 8-15 (Whole Sizes Only) Warranty // Standard Warranty: 1 year from the date of purchase.