The buckle triangle shape makes children's seat most stable and safe, effectively relieves the powerful impact caused by the sudden braking of the car, keep the seat belt in the right position to ride comfortably., Auto Shoulder Neck Strap Positioner: Repositions seat belt for a secure fit. It fits correctly across the shoulder and lap, absorb shocks, keeps seatbelt away from kid’s neck area which gives kids more comfortable and safety., The seatbelt adjuster is easy to install on the seat belt and easy to take off, just add the universal safety strap cover onto a seat belt. It's very convenient and makes your trip more enjoyable and safety.,