SIZE GUIDE - Shoe Size 8-12 = M/L - Shoe Size 13+ = XL From weekends on the mountain to weekdays in the office, the SG Ram Performance Sock is destined to become your new favorite. Crafted from plush memory yarns, the fit only improves with each wear. Grippy yarns ensure your sock stays in place, sewn-in air vents promote excellent breathability, and the Anti-Microbial wash minimizes odor. Constructed with the perfect blend of micro polyester, nylon, cotton, and spandex, it guarantees an optimal balance of comfort, performance, and durability. SPECS: Micro polyester blend Invisible toe seam Never-Slip Grip Memory yarn Anti-microbial wash Air-Vents Compression padding Left/Right specific Stone Glacier SG Ram Performance Sock Black 60041-BK