Axkid has created and designed an angle adjusting wedge that helps to fill the gap between the car seat and the vehicle seats in the car. This gives your car seat a better recline and makes it more comfortable for your child, especially in vehicles with sloped seats. Remember that the car seat should not be steeper than approximately 37 degrees. The angle adjusting wedge is compatible with all the Axkid rear-facing car seats. Dimensions: 17 cm x 23 cm.