Adrenaline GTX (12, Gray) GORE-TEX Product Technology, GUARANTEED TO KEEP YOU DRY, Anchored Lace Loops for Synch-Down Power, Pu Mid-Sole Adds Cushion & Resists Packing Out, Kicker Toe Piece Resists Wear from Tunnel Bolts Stiff Durable Board to Help Disperse Shock & Protect Bottom of Foot, 600 Gram Thinsulate Insulation Increases Warmth Without Unneeded Bulk, Internal Eva Foam to Cushion Top & Tips Of Toes, Multi-Layer Substructure Constructed From Perforated Materials Increases Overall Breathability Moisture-Wicking Liner Materials, Ankle Cutout Promotes Forward Flex, High Quality, Flat Anti-Slip, Moisture-Resistant Laces, Removable Moisture-Wicking Insole, Extremely Durable High-Grip Outsole