The ErgoCocoon 'no origami' baby swaddle sleep bags are designed to be both easy to use and difficult to escape from. The simple zip up design will keep the baby snug and securely swaddled without the need for complicated wrapping. The 0.2 TOG ergoCocoon swaddle sleep bag is designed for Summer temperatures, and made from a thin layer of stretchy cotton fabric. Arm snaps allow arms to be free or tucked in, and the 2-way zipper allows for quick and easy diaper changes.