This is a Moro reflex prevention blanket I bought when I lived in Korea. The inside is mesh, so it doesn't trap heat, and there are weights on the sides to gently hold the baby's body, preventing them from startling due to the Moro reflex!! We used it from newborn to about 3 months, and it was an essential item for us; we couldn't sleep without it^^ - Brand: MUMMYCOOLCOOL (머미쿨쿨) - Type: Quilt (with 1kg weights on each side) - Features: There's a rubber ring inside to hook the feet, so there's no risk of suffocation from the blanket!! - Design: Checkered pattern - Material: Mesh - Size: 55cm wide x 56cm long