Comfortable to wear，high quality，reasonable price100% cottonThere are 3 sizes avaliable: Size 6-12m: Reference Height:50 cm-70 cm;3-12 month Size 1-2 Years:Reference Height:70 cm-90 cm;1-3 years old Size 3-4 Years:Reference Height:90 cm-110 cm;3-4 years oldClever shoulder snaps make placing a sleeping or standing baby in the sleep nest a cinchOversized high quality reverse zipper100 pct cotton exterior and lining for maximum breathability， polyfill quilting