Mast® Car seat 360 i-Size M.ROX 0+/1 (40-150cm) Dark Grey NEW 2025

NEW: Added side protection for enhanced safety

We are pleased to introduce the improved version of the popular car seat Mast M.ROX, now equipped with enhanced side protection (Side Impact Security). This upgrade provides extra protection for the head, torso and hips, especially in the event of a side collision – and at no additional cost!

Comfort and safety come first

The Mast M.ROX car seat grows with your child and is suitable from birth up to approximately 12 years of age (40–150 cm). Compliance with the ECE R 129/03 (i-Size) standard ensures a high level of protection and safety throughout its entire use.

360-degree rotation allows you to turn the seat towards the car door for easy access when placing or removing your child. Children can ride rear-facing until 15 months, with 5 recline positions available. Between 76–105 cm, the seat is used forward-facing with a 5-point harness. Once the child reaches 105 cm, the internal harness can be stored and the car's seat belt is used instead.

Tested and certified to the highest safety standards

M.ROX is designed for long-term use and meets the latest safety regulations. According to the UN R129/03 (i-Size) regulation, seat selection is based on height and includes mandatory side-impact protection. Installation with the Isofix system and support leg reduces the risk of incorrect installation and adds even more safety.

Technical specifications:

• Standard: ECE R 129/03 (i-Size).
• Suitable for: From birth to approx. 12 years (40–150 cm).
• Weight: 15.8 kg.
• Dimensions: W: 43 cm, H: 63 cm.
• Installation:
  • 40–105 cm: rear-facing – Isofix + support leg + 5-point harness.
  • 76–105 cm: forward-facing – Isofix + support leg + 5-point harness.
  • 100–150 cm: forward-facing – Isofix + vehicle belt or only vehicle belt.
• 360° rotation: Easy access and child placement.
• Seat recline: 5 rear-facing positions, 4 forward-facing.
• Headrest: 9 adjustable positions.
• Adjustable inserts: For customised comfort and fit.
• Side Impact Security: Extra protection for head, torso and hips.

What is UN R-129 (i-Size)?

• Child seat selection is based on height rather than weight.
• Rear-facing travel is mandatory until 15 months of age.
• Isofix reduces the risk of incorrect installation.
• Side-impact protection is required.

Why choose Mast M.ROX?

• 360° rotation for maximum convenience.
• Additional side protection for greater safety.
• Long-term use: 0+/1/2/3 – suitable from birth to 12 years.
• 5-point harness and later use of the vehicle belt.
• Adjustable headrest and multiple recline positions.
• Certified to UN R129/03 (i-Size).

Choose Mast M.ROX – a safe, reliable and adaptable car seat that grows with your child and supports them on every journey.

Mast

Unterlettenstrasse 10
9443 Widnau
Switzerland

MAST SWISS DESIGN by HALTHO AG

info@mastswiss.com