ouyun baby organic sleeping bag detachable sleeve wearable blanket,grey,double layer for 68-77°f ouyun 100% organic cotton - super soft, breathable, zero pollution, safe and healthy. four types of thickness for you to choose: single layer cotton; double layer cotton;150g cotton filling; 350g cotton filling zip for easy dressing and diaper changes;the detachable sleeve design, adjust as needed.perfect sack design allows room for kicking and cannot be kicked off at night. washing guide: hand wash(max.86°f); do not bleach; do not dry clean; drip drying in the side. size: small is suitable for height 20"-28" ; medium is suitable for 28"-36" ; large is suitable for 36"-42"