Balega Silver Antimicrobial No-Show Compression-Fit Running Socks for Men and Women (1-Pair) Drynamix Polyester 75%, Nylon 23%, Elastane 2% Imported Compression-fit, no-show performance running sock encapsulates antibacterial silver ions in the yarn to keep feet clean, dry, and odor-free Drynamix polyester blend features fibers and knit patterns of varying tension to provide compression and support without constricting movement Constructed to mimic running shoe design, the silver sock locks in the heel and mid-foot, while allowing the toes to move freely Seamless toe box minimizes friction, preventing blisters and chafing; high tab heel and extra deep heel pocket prevents socks from slipping down Medium-volume cushioning ensures comfort and durability for extended training and endurance events