XOTOES™ Quarter Crew by XOSKIN are engineered with US Patented PTFE & Copper yarns (AKA RAPIDriCOPPER™). These highly specialized yarns combat shear force, heat build-up and bacteria on the skin and improve toe and heel fit comfort, stability and splay. XOTOES™ surround the entire foot and encapsulate the toes and interdigital voids to combat hot spots and chances of blistering & provides rapid wicking and drying while reducing the bacteria load.