I bought this for my child, but they didn't like it much, so it's almost unused. Sanrio characters Warm 2-way Sleeper Color: Pink Size: 70-80cm It can be used as a vest until around 5-6 years old? The back is made of pile fabric, so it absorbs sweat while sleeping. The lining is made of breathable mesh fabric. It's a 2-way type that can be changed with buttons (dress type and coverall type). Sanrio Characters 2-way Sleeper Minna no Okao Hello Kitty My Melody Kuromi Cinnamoroll Pompompurin Pajamas Vest Roomwear Children Kids Goods Cute