The Montrail Hardrock Mid for men features: Gryptonite outsole for great traction and exceptional durability Molded midfoot shank for support and torsional rigidity Trail Shield forefoot for protection from rocks and other trail debris Gusseted tongue to keep out dirt and moisture Perimeter midsole technology for comfort and stability on uneven surfaces GORE-TEX bootie construction for water proof breathability Weight 12.6 oz; 0.35 kg Unless otherwise noted in the "Size_Color" drop down menu, all sizes are in U.S. sizing. Also, unless otherwise noted, men's sizes are in standard "D" width and women's sizes are in standard "B" width. MONTRAIL SHOES RUN SMALL. WE RECOMMEND YOU CHOOSE - 1 FULL SIZE LARGER THAN YOUR OTHER RUNNING/OUTDOOR SHOE SIZE AND 1 FULL - 1 SIZE LARGER THAN YOUR STREET SHOE SIZE.