Our Lightweight Liner sock is perfect—for when you want the comfort and performance of a sock, but don’t want it to show. Stays hidden in any shoe, while providing needed support for everyday wear. Seamless toe for comfort. Featuring a unique arch band to keep the sock comfortably in place. Reinforced heel and toe for added durability. Plus, TRUEENERGY® socks use yarn infused with NASA-developed infrared technology. When combined with your body’s natural heat it forms infrared energy to improve circulation and tissue regeneration—promoting recovery and performance.