This Tasc Performance Longline tee is made from their exclusive BamCo® patent-pending Bamboo fabric finishing process. Tasc Performance apparel achieves it’s unparalleled feel and performance without the use of chemical enhancements. It has all the performance properties you want: UPF50+, moisture wicking, and odor control, and breathability. Best of all, it achieves it all with natural Bamboo, no synthetics! This relaxed tee also offers a shirt tail hemline, longer in the back, sleeves to the elbow and a rounded neck. You'll live in this Longline T!!!!