3 in 1 harness booster helps protect your child, from toddler to youth; harness booster (22 to 65 pounds), high back booster (30 to 100 pounds), backless booster (40 to 100 pounds) Simply Safe Adjust Harness System adjusts the height of your harness and headrest in one motion; one hand, 5 position adjustable headrest easily adapts for your growing child; Buckle may be cleaned with a damp cloth Engineered & rigorously crash tested to meet or exceed US standard FMVSS 213; the Nautilus 65 has been side impact tested for occupant retention solely with the built in 5 point harness system Open loop belt guides properly position vehicle seat belt across child; seat pad, body support and harness covers are comfortable and machine washable Dual cup holders help keep your child's drink close; lightweight, portable seat is ideal for busy, active parents Care Metal and plastic parts may be cleaned with mild soap and cool water. Harness straps may be spot cleaned