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  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
  • For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
For Your Little One

For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)

£57.99
£57.99 -27%
£79.99
Sale Sold out
VAT included. Shipping calculated at checkout.

Shipping (Pre Order Item)

This item is due in to our Warehouse . As soon at the item arrives in our warehouse we aim to ship all Pre-Order Items within 24 hours.

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Designed to keep your child safe and comfortable from 100 cm to 150 cm (approximately 4 to 12 years), the Stepup i-Size ISOFIX 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 a rock-solid ISOFIX connection every single time.

Why Parents Love It

  • i-Size Certified (UN R129) — Exceeds current EU safety regulations for enhanced protection
  • ISOFIX Installation — Rigid, click-in connection eliminates installation errors for total peace of mind
  • Fits 100–150 cm (approx. 4–12 years) — Grows with your child through Group 2 and Group 3 stages
  • Side-Impact Protection — Deep, padded side wings absorb and deflect impact energy away from your child
  • One-Hand Adjustable Headrest — Quickly adapts as your child grows, no tools required
  • Removable, Machine-Washable Cover — Easy to keep fresh and clean
  • Midnight Black Finish — Sleek, premium look 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 rigid ISOFIX connection anchors the seat directly to your car's chassis, removing the risk of incorrect belt-only installation.

Comfort for Every Journey

Thick, breathable padding and multiple recline positions mean your child can settle in whether it's the school run or a long motorway trip. The one-hand adjustable headrest moves in seconds, so you're never fumbling between journeys.

Specifications

  • Safety Standard: UN R129 (i-Size)
  • Child Height: 100–150 cm
  • Approx. Age: 4–12 years
  • Installation: ISOFIX
  • Facing Direction: Forward-facing
  • Cover: Removable & machine washable
  • Colour: Midnight Black

Suitable for children 100 cm to 150 cm in height (approximately 4 to 12 years old). Always check your child's height against the seat's headrest guide before use. ISOFIX connectors must be compatible with your vehicle — check your car's manual or use a car seat compatibility checker.

1x Car Seat

UN R129 i-Size certified for superior safety
Rigid ISOFIX connection — no installation errors
Fits children 100–150 cm (approx. 4–12 years)
Deep padded side-impact protection wings
Multiple recline positions for long journeys
One-hand adjustable headrest — grows with your child
Removable, machine-washable seat cover
Sleek Midnight Black finish
For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
For Your Little One Stepup I-Size Isofix 2/3 Car Seat - Midnight Black (4-12 Years)
£57.99
£57.99 -27%
£79.99
Supporting families since 2011
Our customers say Excellent ★ ★ ★ ★ ★ 4.3 out of 5 based on 3,447 reviews ★ Trustpilot
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Product Benefits

i-Size Safety That Exceeds the Standard

The Stepup i-Size is certified to UN R129 — the latest and most rigorous car seat safety regulation in Europe. Unlike older Group 2/3 seats, i-Size requires mandatory side-impact testing, meaning your child is protected from impacts that traditional standards don't even test for. Paired with rigid ISOFIX connectors, the seat locks directly into your car's chassis for a secure, error-free fit every time you travel.

Grows With Your Child From 4 to 12 Years

Covering 100 cm to 150 cm in height, the Stepup takes your child through both Group 2 and Group 3 stages in a single seat — no mid-stage upgrades needed. The one-hand adjustable headrest moves in seconds to match your child's growing height, while the deep padded side wings reposition automatically to keep protection exactly where it's needed at every stage.

Comfort Built for Real Family Life

The breathable, premium-padded cover keeps them cool in summer and cosy in winter — and when it needs a refresh, simply remove it and pop it in the washing machine at 30°C. The Midnight Black finish looks sharp in any car interior and hides everyday wear beautifully.

Customers are saying

4.86 ★ (12370)
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