I wore this about twice and have been storing it at home. The following is quoted from the official website: This is a set of a top and pants made of the same material, allowing you to enjoy the trendy setup coordination. Both the top and bottom are designed with a good balance of frills, creating a very cute look. The relaxed silhouette makes it comfortable to wear. The bottoms have pockets on both sides. The top opens with a button at the back, making it easy to put on and take off. There is a tag inside to write your name on. Only the ivory color has a lining. [Recommended wearing season: Spring and Summer] [Transparency] Not see-through [Fabric thickness] Normal [Elasticity] None [Lining] None *Ivory has lining [Pockets] Yes [Adjuster] None Material: Ivory: Outer fabric: 100% cotton, Lining: 80% polyester / 20% cotton, Blue: 100% cotton