Combining high-tech HeatGear fabric construction and Under Armour's signature moisture transport system, the HeatGear Solo Liner works to wick away moisture and accelerate evaporation so your feet stay cool, dry, and light. ArmourBlock technology helps prevent the growth of odor-causing bacteria, keeping feet fresher longer. Embedded arch support reduces foot fatigue for long-wearing comfort. The HeatGear Solo Liner is built from a durable blend of 88% polyester, 11% nylon, and 1% spandex fabric. Three pairs per pack. Imported.