Organic Cotton Zipper closure ? The design of unzips from bottom makes diaper change easier, and machine washable. ? Made with 100% natural cotton, it is exceptionally breathable to reduce overheating and ensure comfortable sleep for babies. TOG.0.5 ? With a length of 32 inches, a width of 19 inches, suitable for babies aged from 12-18 months. ? Sleeveless design reduces the risk of overheating, more importantly, it allows room for baby to move and kick. ? This wearable blanket will never be kicked off so baby can stay warm all night, which makes this sleepwear an ideal replacement for old school loose blankets.