Castelli Rosso Corsa Pro 15 Sock When you need the absolute best in performance features and comfort, Castelli's Rossa Corsa line should be your go-to choice. The Castelli Rosso Corsa Pro 15 Socks feature Meryl Skinlife yarns which are super-soft and have anti-microbial properties to help keep your socks smelling fresh, even after long rides. An asymmetrical construction aids in the fit and the socks are made extra-stretchy for comfort. A midfoot support band provides you with arch support and a cushioning pad at the ball of the foot adds comfort and support. To top it off, Castelli added in a reflective tab to keep you seen in low light conditions. Features Meryl(R) Skinlife yarns with antimicrobial silver ions to reduce odor Stretchy construction Midfoot support band Cushioning pad under ball of foot Reflective tab at center back Asymmetrical construction to mirror shape of foot15 cm height Size Chart Size Small/ Medium Large /Extra Large2X Large Men's US Shoe Size5-6. 57-1010. 5-13Men's EU Shoe Size36-3940-4344-47 | Castelli | Rosso Corsa Pro 15 Sock Men's | Size Large/extra Large In Black