The Britax Monarch™ belt-positioning booster features True Side Impact Protection™ for advanced protection in side impact collisions. The one-hand, quick-adjust headrest and height positioning allows for a proper fit. The Monarch also features expandable armrests, color-coded belt route guides, and two retractable cup and snack holders. The seat can also be converted to a backless booster. The Monarch fits children at least 30 pounds and 38 inches and up to 100 pounds or 60 inches.