Fabric part 1: 100% polyester Fabric part 2: Po37% Cu25% Co25% Ny13% Free size col: WHT Switching between tops using two materials. Both materials are light and transparent and have excellent breathability and quick drying. In addition, the zipper attached to both sleeves is one of the features of the design, so even in the hot summer season, you can open the zipper and use it comfortably. Material characteristics: Polyester based material is resistant to wrinkles and shape loss, durable and quick drying. Note: Fabric part 2 contains cupra material, so we recommend hand washing with a neutral detergent.