The Ergobaby Swaddler is a safe, easy and effective way to keep your baby sleeping longer and more peacefully. Thoughtful, easy-to-use design is ergonomic, "escape proof", and comfortable for babies. Recommended by moms and medical experts alike, the Ergobaby Swaddler's innovative features help prevent your baby from startling awake while the ergonomic design allows for natural movement of baby's hips and legs as recommended by the International Hip Dysplasia Institute. Now available in our original cotton knit and a new, lighter weight, more airy fabric. One Size For Infants: 6 – 15 lbs; 19-24"