-Material: High quality cotton, soft enough and high absorbent properties, safe and do not harm to the baby's skin. -The dual zipper makes diaper changing a breeze and eliminates the need to remove the swaddle and having to completely re-swaddle the baby. -The unique wing design eliminates face scratching from baby's finger nails. All seams are sewn on the outside and the zipper is protected so there is nothing rough against baby's skin. -Highly hygroscopic, healthy and skin-friendly, care for your baby's skin. -The wings on the swaddle up allow the baby to both sleep with their arms in their preferred ams up position and gives enough movement so they can self-soothe, all while calming down the startle reflex. Specification: Material:Cotton Color:As the picture shows Age Range:0-9M Pattern Type:Solid Color Size:XS S M L Fit:Normal Size Closure Type:Zipper Size Chart: Size---------Length-----------weight Br XS 0-2M-----50cm 19.7 ---4.5-7lbs 2-3.2kg Br S 0-3M-----58cm 22.8 ---6.5-13lbs 3-6kg Br M 3-6M-----67cm 26.4 ---13-18.5lbs 6-8.5kg Br L 6-9M-----77cm 30.3 ---18-24lbs 8-10.8kg Br 1. 1 inch 2.54cm