The long-sleeve version of Tasc's best selling crew neck is as versatile as it is comfortable and engineered to keep up with your fast-paced lifestyle. Made of MOSOtech:52% organic cotton / 43% viscose from bamboo / 5% lycra® spandex spandex. This long sleeve tee wicks moisture, is anti-odor, has UPF50+ sun protection and offers superior breathability. You'll wonder how you lived without this tee! It's great to wear out in the sun or as a layer in the colder climates.