This fits your . Make sure this fits by entering your model number. 1.100% cotton sleep sack Detachable Long Sleeve,arms up Sleeve，or Sleeveless design: Our swaddling can be used in three ways. It can be used as arms up swaddle to prevent the baby Moro (Startle) Reflex. It can also be used as a sleeping bag by removing the sleeves to smoothe baby into this new sleep routine. You can also use long sleeves as a normal daily swaddling.patented design 2.Style design: Imitating the scene of a baby in the womb, soothing the startle reflex, helping the baby sleep better.The lower part of the swaddle is more conducive to the development of the baby’s buttocks. the design is hip and shoulder friendly and the narrowed waistline gently compresses the tummy, providing additional comfort ,allowing a little more movement and a little less restriction around the midsection for your baby 3.Double zipper design: 2 zipper for night time diaper change. Super convenient!You can quickly change the diaper when the baby is wearing the swaddling, avoiding the trouble of taking off the swaddling to change the diaper Two sizes: M: 6.6-16.6 pounds 0-6 months, L: 17.6-24.2 pounds 7-14 months. 4.(Instructions） 1.Unzip the Swaddle Sack flat and place the baby on the sleeping bag. 2.Pull the zipper to the lower leg position to prevent the baby from kicking off the arms up swaddle. 3.Put your baby arm on top of the wings and zip up. 1.During the transition period, take out one arm of the baby to transition from baby sleeping bag to a normal Swaddle. 2.At the end of the transition, take out hands and expose your arms as ordinary sleeping bags.