The LINER. Is a light-weight technical fabric, designed to breathe, wick sweat and dry quickly. It's untra-thin and seamless design, ensures no rub-points and a comfortable wear all day, under your helmet. Available in two sizes Specifications � Materials: Polyester, spandex � Weight 15 � Sizes: (1) M/L 56-59 cm (2) L/XL 59-63 cm