Dreamland baby weighted transition sleep sack: size large 6-9 months Like new- got as a gift, washed and used only ONE time. Baby preferred another sleep sack. From 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. Gentle, evenly distributed weight to help your baby feel calm Encourages self-soothing for longer stretches of sleep 100% natural soft cotton Cozy fit for easy, post-swaddle transition Weighted arm feature to help reduce Moro reflex Tagless design to avoid irritation Two-way zipper for easy diaper changes