The new Yonex Paris and London line comes with VeryCOOLTM technology that absorbs both heat and sweat, VeryCOOLTM has been shown to decrease body heat by 3oC by blocking infrared radiation and roughly 92% of ultraviolet. This shirt also comes with Yonex's wider ranges of movement, more stretch in the fabric for aggressive movements and antistatic fibers woven in. Material: 89% Polyester, 11% Polyurethane Yonex Apparel 10137CY