Columbia Men's Freeze Degree Short Sleeve Polo (Omni-Freeze ZERO) 92% Polyester, 8% Elastane Zero Jersey Imported 4-way comfort stretch Omni-Freeze ZERO sweat-activated super cooling Omni-Wick EVAP advanced evaporation Omni-Shade UPF 50 sun protection 4-way comfort stretch Ergonomic seaming