The zip-up ErgoCocoon makes swaddling a breeze! Made with stretchy organic cotton, it keeps little ones snug and secure without the hassle of wrapping. Snaps mean arms can either be free or stay tucked in, and the cocoon converts to a sleeping bag when its time to transition. The two-way zipper allows for quick and easy diaper changes, making sure baby stays comfortable all through the night. 0-3 months (fits up to 7kg) and 3-12 months (fits up to 12kg). 100% organic cotton.