The Rugged Blue Class 3 long sleeve high-vis wicking shirt features a moisture wicking mesh polyester fabric to accelerate evaporation and keep you comfortable and dry all day. This safety T-Shirt is made with a Birdseye wicking mesh allowing for maximum breathability without compromising durability. The reflective tape is applied through heat transfer and then lightly stitched to ensure quality and longevity. The wicking properties improve hot weather comfort making it feel much cooler than it is. Class three vests are Reserved for people working in the most dangerous environments where visibility is the highest priority. This includes roadways where traffic is traveling in excess of 50mph, but it can also apply to emergency Personnel or tow truck operators working in blizzard or Hurricane conditions where visibility is at a minimum. A Class 3 ANSI safety Vest is the largest of the ANSI vests because it requires the most background fabric and reflective striping. Because a Class 3 Vest requires a whopping 1, 240 inches of safety Yellow or safety orange background and 310 square inches of reflective striping, it often resembles a short sleeve T-Shirt more than a traditional Vest.