The Pro Liner is for someone looking for a thinner performance sock. These medium compression ski socks wick moisture away from your feet, keeping them warmer and drier from the first to the last chair. 73% ACRYLIC / 24% NYLON (POLYAMIDE) / 2% ELASTANE / 1% POLYPROPYLENE No Cushion Medium compression fit Moisture management 73% ACRYLIC / 25% NYLON (POLYAMIDE) / 2% ELASTANE 38E635405_SLB