Worn only a handful of times to save us during the four month sleep regression and swaddle transition. This helped baby not constantly raise his arms and mess with his face. He grew out of it and we transitioned to the size bigger. From Dreamland’s website: Is your baby ready to transition out of a swaddle? If so, it’s time for our patent-pending Weighted Transition Swaddle, designed to reduce wake-ups and to help transition your baby safely to arms-out sleep. This sleep sack features innovative, 3/4 length gently weighted sleeves that fit snugly to help reduce the Moro (startle) reflex. EveryBODY is different so the sleeve length may fall anywhere between your baby’s elbow and wrist.