Comfy and Soft: PHF sleep sack is made from high-quality 100% cotton, which is super soft, breathable, and lightweight. With every wash, it will become softer and more malleable. The TOG 0.5 fits in all seasons, especially in summer avoiding overheating and supercooling. And ensure the baby has enough sleep. | 2-Way Zipper: Our toddler sleep bag has durable 2-way zipper, which runs from the top to the bottom, makes midnight diaper change easily. The top zipper cover and interior zipper guard prevent rubbing on your baby's sensitive skin and protects baby's chin, ensuring the safety of your beloved baby. | Perfect Design: The large space allows baby's hips and legs to move freely and happily,but cannot be kicked off,so baby will saty warm and sleep peacefully all night long.The arm and neck openings sized for a perfect fit, the sleeveless design avoids the risk of overheating, and keeps baby comfortable in all seasons. These designs are great for promoting healthy development of babies | 3 Pack: Ensure your baby always has a comfortable sleep with our 3-pack sleepsack set,and the new parent has plenty of time to clean and the baby has more choices using 3 pack sleep sacks.Different patterns have different styles after wearing them.It is a perfect gift for baby. | 4 Size Options: The sleep sacks are a must-have for your baby's everyday routine,it will provide optimal comfort for undisturbed sleep.There are 4 sizes available for your choices. Small for 0-6 months, Medium for 6-12 months, Large for 12-18 months, and X-Large for 18-24 months.