A gorgeous, summer weight sleeping bag for baby with a 0.5 tog rating. The uh-oh 0.5 tog sleeping bags are made using super soft 100% cotton for both the outer shell and lining. When using a sleeping bag, do not use any other bedding other than a bottom sheet to cover mattress. The zip head is covered with a tab to ensure that the child is secure within their bag for the duration of their sleep. Hole in back so you can use it in the car with a 5 point harness.