ASI Advanced Sock Integration Fit, Non-Mulesed Merino Wool with Antimicrobial Spandex, Stay-Up Rib Cuff, Logo Embroidery on Cuff, Snug-Fit Heel, Arch Support Rib Knit, Compression Ankle Rib Band, Achilles, Calf, and Shin Cushion, Toe and Heel Cushion, Reinforced Ghost Seam.