Petex Max 301 Backless Booster Seat Grey/Black ECE R129 i-Size 125-150 cm

Certified to the latest ECE R129/03 i-Size standard, the Petex Max 301 backless booster seat provides safe and comfortable travel for children from 125 to 150 cm tall. Its lightweight, compact design makes it easy to move between vehicles, while the integrated belt guide ensures the vehicle's 3-point seat belt sits correctly across the child's shoulder and pelvis.

Overview

The Max 301 is a backless booster seat engineered for older children who have outgrown high-back boosters but still need a lift to achieve proper seat belt fit. It meets the strict i-Size regulation, which mandates side-impact protection and enhanced safety criteria. The seat is suitable for forward-facing use only and is installed using the vehicle's existing 3-point seat belt.

What stands out

• ECE R129/03 i-Size certified for children 125–150 cm tall
• Integrated belt guide positions the seat belt correctly
• Lightweight and compact for easy transfer between cars
• Ergonomic, padded seat with removable, machine-washable cover
• Durable HDPE base with polyester cover in grey/black

Technical details

• Product type: Backless booster seat
• Safety standard: ECE R129/03 (i-Size)
• Child height range: 125–150 cm
• Installation: Vehicle 3-point seat belt
• Seating position: Forward-facing
• Base material: High-density polyethylene (HDPE)
• Cover material: Polyester
• Removable cover: Yes
• Washable cover: Machine washable at 30°C
• Ergonomic design: Yes
• Padded seat: Yes
• Colour: Grey / Black

Our verdict

The Petex Max 301 is a straightforward, safety-first booster that meets the latest i-Size requirements. Its lightweight build and washable cover make it a practical choice for families on the go.