LUXURIOUSLY SOFT BAMBOO FABRIC – Made from buttery-soft 95% viscose / 5% spandex, this best-selling SleepSack swaddle offers unmatched comfort for your baby’s coziest sleep yet. CUSTOMIZABLE 3-WAY SWADDLE DESIGN – Allows for arms in, arms out or hands to face swaddling so your baby can sleep in the position they prefer best. SNUG AND SECURE FIT EVERY TIME – Adjustable wings with hook and loop fasteners create a perfectly snug swaddle that helps prevent startle reflex and encourages longer, deeper sleep. CONVENIENT 2-WAY ZIPPER – Makes middle-of-the-night diaper changes quick and hassle-free without fully removing the swaddle. HIP-HEALTHY AND HOSPITAL TRUSTED – Trusted as the #1 swaddle choice of hospitals nationwide. Approved by the International Hip Dysplasia Institute and trusted as the #1 swaddle choice of hospitals nationwide. By popular request – our buttery-soft bamboo fabric is now available in our best-selling SleepSack swaddle. Wrap your little in luxury for cozier, comfier and yes, longer sleep sessions too! Like all SleepSack swaddles, it features a 3-way design allowing you to swaddle your little in their preferred sleep style; arms-in, arms out, or hands to face. Hook and loop fasteners ensure a snug fit every time. Includes a 2-way zipper for easier changes and a hip healthy sack design.