65% polyester, 35% cotton. 100% polyester contrast mesh panels. Contrast piping. embroidered Yamaha and sponsor logos on the sleeves, shoulders, front, and back. Sueded fabric for extra softness. Mesh side panels for ventilation. Mesh panel added halfway down the back to protect skin from direct contact with embroidery and for added air ventilation. Poly mesh panels also have moisture wicking properties. Front snaps on the placket instead of buttons. Yamaha Licensed Product.