Headband And Long Sleeve Swaddle Sack BundleFor babies 03 months, approx 614 lbs. Includes matching topknot hat. Helps babies fall asleep faster and sleep longer. Safer than traditional burrito wrap methods. Patented legs in and legs out design for warmth or cooling. Legs in for warmth; legs out for cooling and heat dissipation. Long sleeve design with arms in and arms out options (both, one, or both out). Fold over mitten on sleeves. Heart shaped leg pouch supports healthy hip development.