If the call of high mountain streams and the path less traveled ring true for you, our 40 oz. FLYWEIGHT ® ® Wading Boot - Vibram® Sole offers an incredibly lightweight design to help you answer the high-mountain call. The low-profile design maintains full wading boot functionality and the Vibram Idrogrip outsole sticks to wet, mossy rocks, and is reinforced for reliable stud retention.FeaturesLow-profile, lightweight synthetic boot upperWelded TPU film in high abrasion zones for durabilitySpeed lace hooks & lace-toe closureHigh cushion dual-density EVA midsole for comfortStud-compatible 4.5 mm Vibram® Idrogrip rubber outsoleSpecs FABRIC TECH: Vibram® Idrogrip rubber outsole WEIGHT: 40 oz. (1134 g) in size 11 Sizing Simms WadingBoot Size USASize EuroSize UKSize CMSize 5** 4 37 3 22 6** 5 38 4 23 7 6 39 5 24 8 7 40 6 25 9 8 41 7 26 10 9 42 8 27 11 10 43 9 28 12 11 44 10 29 13 12 45 11 30 14 13 46 12 31 15** 14 47 13 32 16** 15 48 14 33