Design: GORE-TEX(R) technology provides breathable, waterproof protection for comfortable wear in all conditions Altra's signature FootShape fit gives you plenty of room to help your toes move freely, witha secure midfoot In-Shoe Comfort: Altra EGO(TM) MAX midsole boasts extra bounce and durability for a light, luxurious performance Durability & Traction: High-performance VIBRAM(R) MEGAGRIP(TM) rubber outsole provides unparalleled grip on both wet and dry surfaces Additional Details: Weight: 9.8 oz / 277 g Stack Height: 29 mm Drop: 0 mm