It has padded, pivoting armrest that help make it easier for kids to get in and out and buckle themselves.

Children bring lots of stuff along for the ride: the Zum has 2 slide-out cupholders each with dishwasher safe removable inserts for easy clean-up. The super comfy pad is easy to remove and is machine washable and dryer safe. 
Whether you Zoom, Zume, Zum or Zuum, the Maxi-Cosi Züm booster will keep kids safer on the every back seat adventure!!  For kids 40-100lbs

Every child is born with the exciting promise of the future. At Maxi-Cosi, we are inspired by that promise. That’s why we do everything we can to help parents raise their families. We are focused on developing products that carry children in the safest and most comfortable way possible. Our car seats have already carried over 50 million babies home from the hospital. And our strollers have shown up when it counts—on the first day of pre-school, at birthday parties, and spontaneous picnics in the park. It’s a duty we don’t take lightly, which is why we stand by our promise: We carry the future.