A super-cooling tech tee with stretch and sun protection, this soft and lightweight men's shirt sports our industry-leading cooling technology, which reacts with your sweat to lower the material's temperature and keep you cool during dynamic aerobic activity in the heat. FEATURES: Omni-Freeze ZERO® sweat-activated super cooling Omni-Wick® Omni-Shade® UPF 30 sun protection Antimicrobial treatment protects this product from bacterial growth Flatlocked construction Uses: Hiking FABRIC: 100% polyester ZERO interlock Omni-Freeze® ZERO Sweat-Activated Cooling Omni-Freeze® Sweat-activated cooling OMNI-WICK® High-Performance Wicking Fabric OMNI-SHADE®  Sun Protection