This piece is made of a medium-weight cotton spandex fabric to allow for comfort and mobility. Features: Sleeveless v-neck henley style Wood buttons on placket Leg snap buttons on sizes 0-3M through 18-24M for easy diaper changes NO leg snaps on sizes 2T through 4T Our signature shapes label on the back Sizing: Sizes 2T-4T run short - size up. Sizes 0-3M through 18-24M are true to size. If your child is in between sizes, please size up.