UPPAbaby recommends transitioning your child out the MESA V2 by their first birthday or the 1-inch rule, whichever comes first. The 1-inch rule is applied when your child is using the headrest in its highest position and when the top of their head is less than 1-inch from the top of the headrest structure. Please note that transition should also occur when your child meets the 35 lb weight limit.
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