The style is designed with our Infiknit construction that won't rip or tear, for life. ButterBlend Ultra Soft sustainable fiber blend delivers premium softness and unparalleled comfort Small Men 3-5.5 / Women 5-7.5Medium Men 6-8.5 / Women 8-10.5Large Men 9-13 / Women 11-14Extra Large Men 14-17 Infiknit Lifetime Guarantee Our Infiknit technology never rips, never tears. Made for good. Crew A classic sock height that hits the mid-point of your lower leg. Medium Cushioning Moderate cushioning throughout the sock for a secure fit with enhanced impact protection. Our premium blend that delivers a superior level of softness. Seamless Toe Closure Seamless Toe Closure for an anti-friction finish your feet will love.