The KeenÂ® Gypsum is the answer to your backpacking and hiking needs. Lightweight and durable, the Gypsum gives you the functionality that you desire on the trail. Waterproof nubuck upper for added durability. KEEN.DRYâ„¢ waterproof breathable membrane ensures that your feet stay dry in a variety of terrain. KEEN.Zorb Strobel. Removable metatomical dual density EVA footbed gives you the long lasting comfort that you need. Torsion stability ESS shank for stability. TPU heel stabilizer. 4mm multi directional traction lugs. Non-marking rubber outsole gives you the grip and traction that you crave. Specifications: Fit Tip: We find this style runs about a 1/2 size small. Lining: KEEN.DRYâ„¢ Waterproof membrane and breathable textile. Activities: Hiking. Type: Shoes, Lace Up. Weather: Wet - waterproof. Weight: 14 oz Product measurements were taken using size 8. Please note that measurements may vary by size.