GORE-TEX waterproof membrane, exceptional breathability and waterproof performance Breathable mesh and TPU upper 100% recycled laces and webbing Bellows tongue keeps out debris 100% recycled breathable mesh lining Mesh footbed cover NXT treated to prevent odor 50% recycled removable EVA foam footbed Molded nylon arch shank Merrell Air Cushion in the heel absorbs shock and adds stability Rock plate for protection Super Rebound Compound provides durable shock absorption to help reduce torque and allow for a smooth transition into the midfoot Vibram TC5+ outsole provides exceptional traction for outdoor multi-sport activities, formulated exclusively for Merrell Drop: 6mm Lug: 5mm 1 lbs-7oz/640g Sizes: 7.5-12 UK Merrell Mens MQM 3 GTX Poseidon Blue Waterproof Lace-Up Trainers J135587