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Britax Frontier ClickTight Harness 2 Booster Car Seat (25-120lbs)

• Toddler to Big Kid: Easily transition from harness to belt-positioning booster as your child grows
• Easy installation: Patented ClickTight makes car seat installation as simple as buckling a seat belt
• No rethreading, ever: Quick-adjust 9-position harness with headrest for a comfortable, secure fit
• Surrounded in safety: 2 layers of side impact protection, steel frame, impact absorbing base, and forward-movement reducing v-shaped tether
• Fits: Forward-facing harness mode 25-90 pounds, Booster mode 40-120 pounds; Maximum Dimensions: 19 W x 36 H x 21 D inches

More information on Amazon

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