The Maxi-Cosi 2wayFix provides the safest way of transporting your child, enabling rearward-facing travel from birth up to approx. 4 years. The 2. Read more +wayFix is part of the 2wayFamily providing the perfect anchorage for the Pebble Plus and 2wayPearl car seats. Both seats are i-Size (R129) compliant and thereby offer state-of-the-art safety performance. The 2WayFix is very easy to use, since it works with the ISOFIX click-and-go installation system, which also provides visual and audio confirmation when you have correctly installed the car seat.