Features we love: Hands-free comfort to explore the world together Creates a custom fit every time you tie so you can safely and comfortably accommodate your baby’s growth and your own body’s unique contours Soft and strong cotton knit is woven with spandex for durability, clinging support and shape retention that doesn’t sag with all-day use Simple tying style and flexible material forms to your child and allows for easy on and off Stretchy fabric makes for hassle-free nursing Boba Baby Carriers and Wraps have been acknowledged by the International Hip Dysplasia Institute as a hip healthy product. To learn more about this visit IHDI's website For What Age Newborn to toddler, however we find that most parents like stretchy wraps best in the newborn/infant phase. For What Weight The Boba Wrap is rated from 7 to 35 lbs. Materials Made from 95% French terry cotton knit woven with spandex, with unique 4-way stretch. Care Machine washable. Tumble dry low. Product Origins: Made in China Boba baby wraps and carriers comply with all U.S. and European standards for child and babywearing safety.