Double layer 100 organic cotton This Baby Sleeping Bag is made of double layer premium organic cotton with a TOG rating of 10 which is most suitable for moderate seasons or climates can help your baby get a peaceful long sleep yearround being not too hot or cold Our sleeping sack can be layered with warmer baby sleepwear when used for cooler temperatures The organic cotton interlock minimizes the risk of overheating and keeps your baby warm and comfortable No struggling with those midnight changes Our sleep sacks feature high quality durable 2way zippers which can unzip from the bottom for easy diaper changes Also no struggling to connect the zipper at babys chin as 2way zippers unzip from the top and make it very convenient to use Your childs safety comes first No more worries about loose blankets in the crib that can get twisted and tangled easily and pose the risk of covering babys face Our wearable blankets were carefully designed to provide a safe and comfortable sleeping environment for your baby Worry free safety tab protects babys neck and chin and ensures a secure closure The bottom zipper cover deters babys hands from unzipping Generously sized and roomy Our sleepbags are generously sized to fit over sleepwear and carefully designed so babys leg can move freely to ensure proper hip development Small size sleep sacks are suitable for babies from 06 months 1018 lbs 2326 in Medium size sleep sacks fit babies from 612 months 1624 lbs 2630 in Large size sleep sacks are suitable for babies from 1218 months 2228 lbs 3035 in XLarge sleep sacks fit babies from 1824 months 2636 lbs 3540 in