Radians ST21B Type R Class 3 High Visibility T-Shirt with Max-Dri™ Moisture Wicking Mesh. The ST21B T-Shirt is made with an arid Birdseye Mesh allowing for maximum breathability, without compromising durability. The stripes are adhered by heat transfer rather than sewn on, making the safety T-shirt wear much more like a regular T-shirt. The wicking properties improve hot weather comfort making it feel much cooler. The front pocket does not include reflective material to allow for corporate imprints. Color blocking at the bottom of the t-shirt.