Portable baby stroller sleeping bag that can also be used as a baby swaddle. This thick sleeping bag protects the baby from cold weather and is suitable for both indoor and outdoor use. quality fabrics and fillings: Outer layer is polyester fiber, inner layer is flannel, and the filling is fluffy down cotton. It features a windproof large fur collar. The material is soft, thick, skinfriendly, breathable, and gentle on delicate baby skin, delivering a warm experience. Large space design: Unfolded size is approximately 100 x 48 cm. Manual measurement may have a small error. The generous size provides ample room for movement, reducing restriction and supporting the baby's growth. Suitable for babies aged 03. Convenient and practical design: The plush neckline is detachable for versatility. Cuffs can be folded to allow arm movement. Double zipper design and side Velcro enable easy diaper changes and everyday use. Thoughtful design meets the daily needs of you and your baby. Use scenarios: Outdoors: Ideal for stroller outings in cool or windy weather, keeping baby warm without bulky layers. Indoors: Works as a cozy swaddle or nap bag at home or daycare, providing secure warmth. Travel and onthego: Lightweight, easy to change, and adjustable features help when moving between locations or during trips.