Pearl Izumi Women's Elite Inrcool Tri Singlet MAIN BODY: 63%NYLON/22%ELASTANE/15%POLYESTER BACK PANEL, STRAPS: 80%POLYESTER/20%ELASTANE Imported ELITE Transfer In-R-Cool fabric powered by coldblack&reg; provides superior cooling and reflective sun protection ELITE Transfer Aero fabric is strategically placed for superior aerodynamics Elite Transfer In-R-Cool fabric features Lycra Sport that helps garments maintain original compression levels A clothing system that works to help you maintain the perfect temperature for the weather conditions and activity range day in and day out