Using gradual compression, the 2XU Long Sleeve Compression Baselayer Top increases blood circulation for improved recovery and decreased muscle stiffness. Constructed from 70 Denier PWX Flex fabric, this high-tech baselayer provides 360° stretch for unrestricted movement, and flatlock seams to eliminate chaffing. The fabric is breathable to prevent overheating, and it manages moisture to keep sweat at bay.