For Your Little One Stepup i-Size Belted Group 2/3 Car Seat — Slate Mist. Designed to keep your child safe and comfortable from 100 cm to 150 cm (approximately 4 to 12 years), the Stepup i-Size Belted car seat is the last car seat you'll ever need to buy for this stage. Built to the latest UN R129 i-Size safety standard, it delivers superior side-impact protection and installs simply and securely using your car's existing seatbelt — no ISOFIX required.
Why Parents Love It
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i-Size Certified (UN R129) — Exceeds current EU safety regulations for enhanced protection
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Seatbelt Installation — Fits any car without ISOFIX, using your vehicle's existing 3-point belt
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Fits 100–150 cm (approx. 4–12 years) — Grows with your child through Group 2 and Group 3 stages
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Side-Impact Protection — Deep, padded side wings absorb and deflect impact energy away from your child
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One-Hand Adjustable Headrest — Multiple height positions adapt quickly as your child grows, no tools required
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Removable, Machine-Washable Cover — Easy to keep fresh and clean
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Slate Mist Finish — Cool, understated tone that suits any car interior
Safety You Can Trust
The Stepup i-Size meets the stringent UN R129 regulation, which requires extended side-impact testing and a minimum height requirement — giving your child significantly more protection than older Group 2/3 seats. The belt-only installation means this seat is compatible with virtually any vehicle, making it a versatile choice for families with multiple cars.
Comfort for Every Journey
Thick, breathable padding and a one-hand adjustable headrest with multiple height positions mean your child can settle in comfortably whether it's the school run or a long motorway trip.
Specifications
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Safety Standard: UN R129 (i-Size)
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Child Height: 100–150 cm
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Approx. Age: 4–12 years
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Installation: Seatbelt (belted)
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Facing Direction: Forward-facing
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Cover: Removable & machine washable
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Colour: Slate Mist
