As Soon As Your Baby Shows Signs Of Trying To Roll, You Must Stop Swaddling. Our Swaddle Uptm Transition Bag Is The Simplest Sleep Solution To Transition Your Baby Safely From Being Swaddled To Arms Free – All While Maintaining Their Cherished Sleep Routine. Swaddle Up T/Bag Lite Fabric Content: 93% Cotton, 7% Elastane 0.2 Tog Fabric Is Ideal For Warm Climates Available In 2 Sizes: Medium & Large Certified ‘Hip-Healthy’ Design Allows The Recommended Flexion For Hips & Legs Patented Zip-Off Wings