Outer & Lining: 93% Cotton 7% Elastane, Filling: 100% Cotton AN EASIER TRANSITION FROM SWADDLING TO ARMS FREE SLEEP: Once your baby starts to show signs of rolling, it's time to stop swaddling and transition them to arms free sleep. Our unique, award winning Swaddle Up Transition Bag, is an easy way manage this change while helping to maintain an established sleep routine. Specially designed to provide the secure feeling of a swaddle while the zip-off wings allow a gentler and gradual move to arms-free sleeping. DESIGNED TO PRESERVE SLEEP ROUTINE & KEEPS BABY SETTLED: Our uniquely designed zip off wings allow for one arm to be free & the other swaddled, maintaining that familiar swaddled feeling. After a few nights, simply remove the remaining wing so both arms are free. This is an easy way to achieving arms free sleep while helping to preserve an established sleep routine. Once both wings are removed, continue to use as a sleeping bag providing the snug feeling baby is used to for longer-lasting use. SAFER SLEEP: Carefully designed with safety as a top priority. Swaddle Up stays on throughout sleep time, keeping your baby comfortable & feel secure with stretchy fabric that has a snug fit, without the need for blankets or loose layers making it a safer option. All our sleepwear are specially designed for different room temps & seasons to reduce the risk of overheating. Our products are made to the highest quality standards, are performance tested & certified by the relevant safety standards. SWADDLE IN SECONDS: Swaddle perfectly in seconds! Swaddle UP has one two-way zipper, no scratchy velcro, no fussy studs, just a super easy, convenient and simple to use swaddle that's perfect for any parent, grandparent or caregiver, even in the middle of the night. Swaddle UP is designed for simplicity with no learning curve and no breakouts. The clever twin zipper means quick and easy diaper changes. TRIPLE-LAYERED CONSTRUCTION: featuring a built-in blanket for superior warmth & comfort. Designed with 2.5 TOG fabric, an ideal choice for COOL room temperatures between 61-68 degrees. Once your baby show signs of rolling over our Stage 2 Transition Sleep Bag and Sleep Suits help maintain an established sleep routine and keep your baby settled during the transition phase. These products continue to provide secure feeling of a swaddle and the zip off wings allow a gentler and gradual move to arms-free sleeping.