What is a wearable blanket, and is it necessary for babies? First, it's important to know that when it comes to safe sleep, guidelines say that there shouldn't be any blankets or loose fabric in a crib. But is a sleepsuit alone enough to keep your little one cozy and warm? That's where sleep sacks come in! Sleep sacks are perfect for keeping babies and toddlers comfortable and safe throughout the night. They're great for when your little one is transitioning out of a swaddle or needs something they won't kick off in their sleep. During sleep, it's important to choose breathable and lightweight materials for infant sleepwear. The ATTABABY sleep sack is made of rayon from bamboo and quality cotton, ensuring babies sleep in a warm and cozy environment while being extra soft to the touch. We've also seamed all the lining to make it smooth and durable. With a 0.5 TOG rating, it's perfect for room temperatures between 75°F and 78°F, pairing perfectly with sleeveless onesies for summer or long-sleeve pajamas for cooler weather. We've designed this baby sleeping bag with your little one's safety and your convenience in mind. The unique side-open structure makes it a breeze to get your baby dressed and undressed in just three simple steps. And with the underarm zipper, you can rest easy knowing your baby can't unzip themselves in case of catching a cold or worse, leaving loose fabric around the face. The spacious bottom leaves plenty of wiggle room for the babies, promoting healthy hip development. The smooth 2-way zipper allows you to change your baby's diaper at night without waking them. Carefully chosen gender-natural color palette. Our ATTABABY sleep sacks come in a serene sky blue, a warm and comforting pastel yellow, and a soft and reassuring natural green. Every color has been carefully selected to help your baby drift off into a peaceful slumber.