The Britax Grow With You ClickTight Plus harness-2-booster car seat grows with your child from toddler to big kid. The SafeWash cover is soft to the touch and safe to machine wash, with a knit construction that’s naturally flame retardant. With ClickTight, you can install with confidence, every time. 3 layers of side impact protection surround the head, neck & torso. SafeCell Technology acts as a crumple zone to help absorb crash energy. With arm rests, cup holders and harness comfort pads, even big kids enjoy the ride.