Fabric part 1: polyester 100% Fabric part 2: Po37% Cu25% Co25% Ny13% Fabric lining : polyester 100% Free size col: NVY Pants that combine two materials. Both materials are light and transparent, with good breathability and quick drying. * There is no need to worry about underwear because it is lined. Material properties: Polyester based material is resistant to wrinkles and loss of shape, durable and quick drying. Note: Body part 2 contains cupra material, so it is recommended that you hand wash with a mild detergent.