FiveFingers are designed around the foot's measurement in inches. There is no real 100% translation between your US size and FiveFingers size. In order to find the right size, please measure both feet from heel to tip of longest toe with a ruler in inches. Take the longest measurement for your longest foot and refer to our women's size chart or men's size chart .Please click here for a video about how Vibram shoes should fit.Tough terrain won't hold you back with the minimalist yet red design of the Vibram FiveFingers® Trek Ascent LR hiking shoes! Built specifically to promote a barefoot-like experience.Ideal for hiking tough terrain.Kangaroo leather and hemp upper.Upper envelopes the foot to help keep debris out.Speed lace system allows for quick-and-easy adjustments, and accommodates a wider foot or higher instep.4 mm polyurethane insole with Dri-Lex® sock liner featuring antimicrobial technology for a great in-shoe environment.4 mm EVA midsole provides lightweight cushioning and shock absorption. 4 mm Vibram® rubber outsole provides exceptional underfoot feel without compromising abrasion resistance.Machine washable. Air dry away from sun or heat source. Imported.Measurements: Weight: 6 ozProduct measurements were taken using size 41 (US Women's 9-9.5), width B - Medium. Please note that measurements may vary by size.