Kinderkraft Oneto3 i-Size car seat 76–150 cm with ISOFIX, Harbor Blue

167,00 €
External warehouse · At your place 06 / 16
Product code: 537646-1
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Kinderkraft ONETO3 i-Size is a safe and comfortable car seat for children 76–150 cm (approx. 15 months to 12 years) that meets the R129 i-Size standard. It offers easy and secure installation thanks to ISOFIX and Top Tether, advanced side-impact protection Side Protect System, a reinforced headrest H-Guard System, Reclining (5 positions), and growth adjustment via the Easy Grow System (18 levels).
i-Size R129 safety and reinforced head protection

i-Size R129 safety and reinforced head protection

The car seat meets R129 i-Size and is equipped with the H-GUARD SYSTEM – a three-layer headrest with memory foam that helps absorb and disperse impact energy and protect the child’s head and neck.

Easy and correct installation using ISOFIX + Top Tether

Easy and correct installation using ISOFIX + Top Tether

Fast in-car installation thanks to ISOFIX. For smaller children, Top Tether is also used. Both systems feature correct installation indicators, so you can be confident the seat is secured safely.

Grows with your child: 18 headrest levels and 5 recline positions

Grows with your child: 18 headrest levels and 5 recline positions

Thanks to the EASY GROW SYSTEM, you can adjust the headrest and harness with one hand up to 18 levels. The RECLINING function offers 5 positions for more comfortable travel and better seating for your child.

The Kinderkraft ONETO3 i-Size car seat was designed to accompany your child for many years – from the first trips as a toddler through to school age. It meets the latest R129 i-Size safety standard, giving you confidence that your child is traveling in the correct height category. A comfortable wide seat, pleasant materials, and thoughtful details make it an ideal choice even for longer journeys.

Safety and correct installation are ensured by the combination of ISOFIX and Top Tether with correct-fit indicators. Impact protection is provided by high side protectors SIDE PROTECT SYSTEM and the three-layer H-GUARD SYSTEM headrest with memory foam for improved energy dispersion.

Grows with your child: thanks to the EASY GROW SYSTEM, you can adjust the headrest and harness simultaneously with one hand up to 18 levels. For the smallest children, a removable insert is included, and as your child grows, you can stow the seat’s internal harness and secure your child with the vehicle seat belt. Practical features include side hooks for the straps and a machine-washable cover.

  • Child height: 76–150 cm (approx. 15 months to 12 years)
  • Standard: UN R129 i-Size
  • Installation: ISOFIX + Top Tether (with indicators); for older children, use is also possible without ISOFIX
  • Protection: SIDE PROTECT SYSTEM + H-GUARD SYSTEM (3 layers, memory foam)
  • Recline: RECLINING – 5 positions, one-hand adjustment
  • Adjustment: EASY GROW SYSTEM – 18 headrest levels
  • Care: machine-washable cover

Specifications

Brand
Kinderkraft
Model
Oneto3 i-Size
Color
Harbor blue
Child height
76–150 cm
Recommended age
from approx. 15 months to approx. 12 years
Safety standard
UN R129 i-Size
Vehicle installation
ISOFIX + Top Tether (with correct installation indicators); for older children, use is also possible without ISOFIX connectors
Side protection
SIDE PROTECT SYSTEM (SPS)
Head protection
H-GUARD SYSTEM (3-layer headrest with memory foam)
Recline
RECLINING – 5 positions
Headrest adjustment
18 levels (EASY GROW SYSTEM)
Insert for the smallest children
removable
Shell and base material
high-quality plastic
Upholstery material
polyester
Headrest and seat material
foam
Folded dimensions
58 × 44 × 58 cm
Unfolded dimensions
58 × 44 × 78 cm
Inner seat length
32 cm
Seat length (in reclined position)
58 cm
Outer seat width
43 cm
Inner seat width (usable)
32 cm
Overall outer width
47 cm
Inner height min.
48 cm
Inner height max.
74 cm
Outer height min.
58 cm
Outer height max.
78 cm
Inner backrest width (min.–max.)
32–38 cm
Outer backrest width
46 cm
Outer headrest width
38 cm
Inner headrest width
27.5 cm
Weight
11 kg
Care
machine-washable cover
167,00 €