2-stage Swaddle BundleUsed in hospitals across the U. S. Helps babies sleep safer, longer, and faster Patented legs in & legs out design for warmth or cooling Legs out option increases heat dissipation to reduce overheating Arms in option soothes the startle reflex No breakout design keeps baby tucked in Heart shaped leg pouch supports proper hip development Length adjustable with three sizes for a better fit Hidden arm snaps allow arms in or arms out options No rise