The Airi Highback Booster Seat is a safety-focused travel solution for growing kids, suitable for children weighing 40–100 lbs or 43–57 in tall. Equipped with a precision belt guidance system, it keeps seatbelts from slipping and twisting for safer rides. Reinforced frontal impact protection and built-in head support work with soft padding to deliver all-day comfort. Compliant with FMVSS 213B standards and latest US safety standards.Weighing only 4.1 lbs, this slim foldable seat fits 3 across in most vehicles, ideal for multi-kid families. It features a removable, machine-washable cover for effortless daily cleaning and long-term hygienic use for kids.