This upgraded sleep sack gives your little one the best of both worlds! Start with arms swaddled in for that cozy, soothing embrace that calms the startle reflex, then switch to arms-out mode as baby grows and learns to roll. The snug torso fit keeps them snuggled while allowing plenty of room for healthy hip movement. With convenient snap closures at the armholes, you can easily adjust the fit as your baby develops. It's the sleep solution that grows right alongside your child, from newborn cuddles to toddler adventures. Sweet dreams ahead!