Rear-facing 4-35 poundsnAccommodates a 4 pound tiny travelernAir Protect + combines the advanced protection of our Air Protect® cushion system with patented GCell® HX hexagonal shaped foam for superior protection around the torso. Together they provide full body side impact protection.nAdjustable stay-in-car basenCarry CurveTM Handle for comfortable and easy carryingnThe onBoard35 Air+ Infant Car Seat features Air Protect + technology to keep children from 4-35 pounds safer in the car. Air Protect + combines the advanced protection of our Air Protect® cushion system with patented GCell® HX foam designed with hexagonal shapes for superior protection around the torso. TOGETHER they provide full body side impact protection.In addition to Air Protect +, the onBoard35 Air+ is LATCH equipped with an adjustable stay-in-car base with LATCH storage. We've also included a customizable infant insert to give a safer snug fit to tiny travelers.