Work Shirts Built for Comfort and Performance: This TRUEWERK B1 short sleeve work shirt is lightweight, moisture wicking, breathable and contains 50+ UPF protection for maximum comfort Easy Wearing, Hard Working: This short sleeve work shirt for men features an athletic cut and form-flattering fabric that is comfortable and handles the rigors of the job site Performance Work Shirt: B1 work shirts are designed from a breathable performance knit fabric to deliver all day comfort and moisture wicking treatment to guarantee a fast dry with maximum breathability UV Protection: This work shirt is thermo-regulating and provides UV protection to help keep you cool and shield your skin from the sun's rays during any outdoor activity Durable Work Shirt: Men's short sleeve shirt with athletic fit is 100% polyester and machine washable for easy care The B1 Sun Short Sleeve Tee isn't just a work t-shirt, it's performance workwear. It's built to keep you cool, comfortable and provides UPF +50 sun protection. When it comes to jobsite uniforms, the B1 sun tee is the tactical gear you need. Wear it alone or use it as a base layer under any one of our mid-weight products. It's designed with ultimate performance knit fabric with a high resistance to pilling, so you can trust it is tough enough for any job. You'll be cool, dry and comfortable no matter where you are: at home, in the office, or on the job site.