For tomorrow’s ski movie stars and Olympians who go all-out every time they are on the hill, the Bug Liner’s unique mixture of materials helps with moisture management, while providing compression at the ankle and arch to provide maximum comfort when the plan is to stay in ski boots all day long. 77% ACRYLIC / 20% NYLON (POLYAMIDE) / 2% ELASTANE / 1% POLYPROPYLENE Components are produced without PFAS chemicals No cushion Medium compression fit Moisture management 38F633602