Zappos.com is proud to offer the Oboz - Yellowstone II BDRY (Smoke) - Footwear: Don't put a limit on how far you can go! Go the distance with the Yellowstone™ II. ; B-Dry™ waterproof breathable membrane allows vapor to escape your foot, but is impervious to water coming in. ; Two part midsole: -Dual density EVA for stability and cushioning. -Nylon shank for lateral and torsional flex control. ; Strobel lasted. ; Sawtooth outsole. ; Anatomically engineered footbed is contoured to your foot and provides all day cushioning. ; 3D injection molded external heel counter provides long term support, motion control and heel lock. ; Non-marking, high friction outsole for traction on all types of terrain. ; Weight: 1 lb 6 oz ; Product measurements were taken using size 9. Please note that measurements may vary by size.