The Arc'teryx Women's Acrux SL GTX Approach Shoe is an ultralight shoe for the approach. Sticky rubber underfoot courtesy of the Vibram; MegaGrip; Outsole grips on rocky scramble sections. A breathable Gore-TEX; liner keeps rain out, even puddles assuming you're not sending water over your ankle. EVA foam at the Midsole cushions and absorbs shock for comfort through every step of the trail. Features of the Arcteryx Women's Acrux SL GTX Approach Shoe Midsole: Injected EVA, 60 Shore C Upper: PU coated nylon yarns, TPU High abrasion protection films, Integrated sticky rubber toe cap Chassis: Injected TPU, 70 Shore A Sole: Vibram light approach, megagrip compound Front and rear pull loops to allow you to put shoe / boot on more easily in.Yin. Groove split heel Technology for improved braking Custom patterned Vibram Outsoles Vibram MegaGrip rubber compound is durable and grippy Spherical heel shape for improved braking and smooth stride Custom developed 3D moulded Ortholite Footbed delivers maximum comfort, breathability and arch support Vibram Arcteryx Light Approach Outsole combines a sticky Climbing zone and smearing inserts with a mountaineering heel tread for ease of stride Laminated heel and toe caps secure Fit and and deliver precision support Seamless one piece Upper with thermolaminated construction is Highly abrasion resistant, durable, light and hydrophobic Highly durable EVA foam Midsole absorbs shock while providing precision stability Tongue free liner ensures a larger breathable surface Area and increased waterproof coverage Arcteryx Adaptive Fit Lite employs a zonal stretch liner that forms to key Areas of the foot for a customized, supportive Fit Stetchable Gore-Tex liner TPU High abrasion protection films Integrated sticky rubber toe cap