Size small (3-6 months) swaddle with removable weighted arms for a swaddle transition. both sleeves have a mitten cuff. Meet our best-selling swaddle transition solution perfect for babies with a strong startle reflex. The ultimate wearable blanket with our signature padded Swaddle Sleeves for easy swaddle transitioning; patent pending This is NOT a weighted product, per the updated AAP guidelines for sleep safety Doesn’t restrict movement? Check! Reduces risk of overheating? Double check! Can be used long-term in numerous different ways? Check, check, and check! Zippered sleeves are designed with optional mitten cuff to soothe baby's involuntary movements when asleep while still allowing for full range of movement & rolling