About this item【Important Safety Notice for Baby Carriers】Mothers with shoulder injuries or chronic pain should avoid prolonged use of this carrier.Limit continuous wear to 30 minutes at a time.and be sure to maintain balanced posture.【Ergonomic Design For Baby and Wearers】 Designed for extended wear with extra-wide comfort shoulder strap that disperses 80% shoulder pressure to traditional straps.ASTM-certified toddler carrier for 8-55lbs (0-36 months).Objectively speaking, the single-shoulder baby carrier is recommended for babies between 8-35lbs to be more comfortable.Ensure your baby maintains the correct M-shaped leg position.Passes the hip joint health test, and reduces the risk of developmental problems.【Easy to use】Quick on and off in 10 s.