Keep baby cozy and warm without loose blankets. Ergo baby's Premium Cotton Sleeping Bag is an adjustable, wearable blanket made with ultra-soft and breathable 100% cotton, allowing your baby to sleep longer and more peacefully. The Premium Cotton Sleeping Bag can be worn over additional layers of clothing on cooler nights, and the two-way zipper is amazing for quick diaper changes. Plus- it's easy to use, so putting it on is as simple as snap, snap, zip. TOG: 0.3; Machine washable