I used these once each for swaddling, but they were small from the time of purchase and my baby quickly outgrew them, so I'm reluctantly selling them. Since they are a set of two, they are convenient for alternating use! An Ergobaby swaddle with an ergonomic design that considers the baby, allowing the baby to move their bottom and legs freely while still swaddling for security. Sleep safely and comfortably with the Ergobaby Swaddler. (Special kindness for your baby) Made of 100% cotton, breathable and supple terry cotton. It doesn't trap heat, and your baby will be comfortable. (Arm Pockets) Recreates the posture of a fetus in the womb, with arms folded and hands on the chest. The arms are bundled, providing security. (Leg Pouch) Diaper changes are possible while swaddled in a swaddler with a spacious area that doesn't restrict leg movement. (Ergonomic Position) It secures only the upper body while maintaining the baby's natural open-leg position/ergonomic position. Size: M/L