SockGuy’s SGX socks are designed with the elite athlete in mind and feature our exclusive Elite Performance Formula. Key Features:The SGX sock line gives a compression fit, performance ribbing, enhanced ventilation and a reduced friction profile. ,These socks feel great, look great, and with SockGuy’s signature Stretch-to-Fit sizing and reinforced toe & heel, SGX socks perform like no other. ,Guaranteed to be the most comfortable performance socks you’ll ever wear. ,Cuff Height : 5",Size: S/M (4.5-8.5) L/XL (8.5-12.5).