Comfortable and Adjustable: The seat belt extender is constructed using eco-friendly polyester for children 1 year and older up to 40 inches and weighing 22 to 44 pounds. Universal Design: This must have kid safety accessory can adjust to fit just about every size and type of airplane seat making it one of the necessities when flying with kids. Lightweight and Portable: Compacts to under 6 inches and weighs only 1 pound so it’s both easy to carry in a diaper bag or carry on luggage and isn’t heavy on a small toddler. Easy to Use: It takes under a minute to install into the airplane's seat and takes away the inconvenience and hassle of having to carry boosters onto your flight. Safe and Secure: These are designed specifically for airplane travel only with a locking buckle and tight straps to keep your child safe during take off, landing and if any turbulence occurs.