Beat the heat and stay visibile on the job with our Mobile Cooling® Short Sleeve Hi-Vis Shirt—made with DriComfort® GEO 365 mineral infused fabric, pulls heat and moisture from the body and dries 4x faster than cotton , and has all-day sun protection with UPF50 . Lightweight and easy to care for, won't shrink or wrinkle, just a super comfortable shirt that performs on even the hottest days.