Fabric Content: Outer: 93% Cotton 7% Elastane; Lining: 95% Cotton 5% Elastane 𝐑𝐈𝐆𝐇𝐓 𝐒𝐈𝐙𝐄 = 𝐁𝐄𝐓𝐓𝐄𝐑 𝐒𝐋𝐄𝐄𝐏: Choose the SIZE M (MEDIUM) Swaddle UP baby sleep sack made for 13 – 19 lbs, and up to 68 cm / 27 in. Tap the size chart to confirm weight and height, then buy with confidence. The right weight-based fit keeps this arms-up sleep sack snug at the shoulders while hips stay free, stops fabric creeping over faces, reduces returns, and lets every tired parent enjoy longer, safer sleep night after nigh 𝐇𝐈𝐏 𝐇𝐄𝐀𝐋𝐓𝐇𝐘 𝐒𝐋𝐄𝐄𝐏 𝐒𝐀𝐂𝐊: The super soft, stretchy fabric of our sleep sacks moves with baby's body. The baby swaddle offers ample space for hip and leg movement, promoting natural development of the hip joint. Recognized by the International Hip Dysplasia Institute 𝐂𝐎𝐌𝐅𝐎𝐑𝐓𝐀𝐁𝐋𝐄 𝐒𝐋𝐄𝐄𝐏: Designed with your baby’s comfort and well-being in mind. The Swaddle Up stays in place through the night with soft, stretchy fabric that provides a snug fit, removing the need for loose blankets or layers. Each piece is made for specific room temperatures to help reduce the risk of overheating. 𝐒𝐍𝐔𝐆 𝐒𝐋𝐄𝐄𝐏 𝐒𝐀𝐂𝐊: The arms up swaddle, featuring our classic North Star print, has controlled resistance, ensuring ideal arms up snug fit across the torso to support baby's self-soothing, with no loose layers to kick off during sleep 𝐃𝐎𝐔𝐁𝐋𝐘 𝐒𝐍𝐔𝐆𝐆𝐋𝐘 𝐒𝐋𝐄𝐄𝐏 𝐒𝐀𝐂𝐊: Suitable for all year round use, our newborn swaddle is made with 2 layers of soft brushed cotton for added extra softness and warmth, and is ideal for room temperatures between 64°F & 72°F Love to Dream Baby Sleep Sack, Swaddle UP Self-Soothing Swaddle Sleep never felt this snug with our Swaddle UP Self-Soothing Sleep Sack, featuring our classic North Star print. Our ""arms up"" baby sleep sack, also known as a swaddle or wearable blanket, is designed to allow baby's arms to be positioned upward and close to their face while they sleep. 83% of parents reported an increase in hours slept by their baby when using Swaddle Up Baby's Natural Self-Soothing Sleep Position Most babies are more comfortable with their arms near their face, as this mimics the fetal position they were accustomed to in the womb. Allowing their arms to be up can enhance their sense of security and comfort during sleep. The ability for babies to self-soothe by touching their face or sucking on their fingers can be comforting. An arms-up sleep sack facilitates this natural soothing mechanism, promoting better sleep for baby. Babies have a startle reflex, also known as the Moro reflex, which can sometimes wake them up. Swaddling with arms up can help reduce this reflex, preventing unnecessary disturbances to their sleep. Easy to Use, Hip-Friendly Design Our baby sleep sacks are designed to provide ample room for baby's legs and hips to move naturally, allowing for healthy hip development. The clever two-way zipper mechanism means quick and easy diaper changes for any parent, grandparent or carer, even in the middle of the night. The Medium Weight Material is suitable for all year round, and ideal for room temperatures between 64°F & 75°F. Doubly snugly and made with 2 layers of fabric, this swaddle sack is made with soft brushed cotton for added extra softness and warmth. Fabric content: Outer: 93% Cotton 7% Elastane; Lining: 95% Cotton 5% Elastane. The Love to Dream range has grown to provide a portfolio of sleep solutions designed for children up to four years old.