The Taylor Double Trouble stripe shirt is crafted in our proprietary thirty-singles fine weight jersey, and knit from a blend of Peruvian Pima Cotton Elastane yarns. Our breathable, hypoallergenic, non-GMO, ELS Pima (extra-long staple) cotton, the smoothest in the world, is also the purest of cellulose fibers, and like all cellulose fibers, are biodegradable.