high-back to booster: designed to growfrom the makers of the IIHS best bet kid fit booster, the kid fit zip air Plus 2-in-1 booster boasts premium features like an innovative, quick-release LATCH for grab-and-go convenience and 3D air Mesh fabric for breathability. These features and more Combine to make the kid fit zip air Plus one of the most comfortable, trusted and easy-to-use booster seats. /breathability + washabilitykidfit zip air Plus includes 3D air Mesh channels throughout the backrest and seat for increased air circulation where kids need it most. The extra padding features a convenient zip-off design, making them easy to remove for cleaning while still maintaining use of the standard fabrics underneath. All fabrics, including armrest covers, are removable and machine washable./engineered for comfortkidfit zip air Plus features a contoured, ergonomic plus seat with 3 layers of foam padding and a one-of-a-kind zip-on cushioned leg rest for first class comfort. A 2-position backrest adjusts to mimic the vehicle seat position. The backrest is easily removable to create a backless booster for older children.customized protection + ease of useduoguard side impact protection Offers 2 layers of protection: a rigid shell and high-quality, EPS energy-absorbing foam that surround the head and torso with integrated side wings. The high-back booster easily adjusts throughout 10 height positions to extend side impact protection as kids grow. premium LATCH connectors and a force-multiplying, SuperCinch one-pull tightener stabilize the seat for easy in/out and keep it secured when unoccupied. The upgraded quick-release LATCH provides convenient one-hand removal from the vehicle LATCH system for easy transfer between seats and vehicles.