This Meyco baby sleep overall jumper offers the familiar feeling of a sleeping bag, but your little one can walk around and continue exploring the world thanks to its two legs. The jumper is made from 100% pre-washed muslin cotton, making it perfect for use on warmer summer days and nights. Muslin cotton breathes very well, has excellent moisture absorption, and dries quickly. This keeps your little one's sleep environment at the perfect temperature during warm days and nights without overheating. The jumper pairs well with the entire Meyco baby collection. In the jumper sleeping bag, your little sleeper's legs are each in their own leg, allowing for plenty of freedom of movement. It's very practical and safe when your child is learning to walk or stand. The long zipper at the bottom allows you to easily change your child's diaper and put on or take off the pajamas. The jumper has a TOG rating of 0.5. The higher the TOG rating, the warmer it is.