Mission Cooling Safety Shirt, XXL Hi-Vis Yellow Reflective Design Cools Up to 2 Hours - HydroActive Wet-to-Cool Technology, our fabric cools up to 30 degrees below average body temperature in under 1 minute stays cool for up to 2 hours. Activate reactivate in 3 steps: wet it, wring it out wave it. UPF 50 Sun Protection - chemical free. ANSI Certified TYPE R, CLASS 2, NO FR with 360-degree reflective strips. Lightweight and stretchy with mesh-ventilated side panels add breathability and airflow to keep you cool. Machine washable, reusable and odor free. High visibility to provide contrast against your surroundings?so you?ll stand out while working outdoors near heavy machinery or traffic.