Britax evolva 123

Question

Hi there,

Merry Christmas / Happy Holidays

i have a Britax Evolva car seat which is meant for 9 months to 11 years old. i have a 4 year old child but the straps wont extend long enough - i have them as long as i can get them and on all the highest settings etc.

is there a reason for this, and how do i get the straps longer?

Thanks