Recreational & Family - Kid's with helmets in bike trailers

last week i picked up a bike trailer for my toddler (2 yr old). friday evening, we got him a helmet. my question is, pre-helmet, i have the straps set up so he doesn't slump over and he's stays upright as much as possible. now. once we begin wearing the helmet, i know it will push against the back of the trailer and push his head slightly forward. is there any kind of seat cushion that i can get to sit him on so it gives him enough distance between him and the back of the trailer so his head will stay up.

i searched around, and i've seen where people just cut a slit in the back out the trailer, but i'd rather keep that as a last resort. any other options?

A small pillow or a towel will do the trick.

A small pillow or a towel will do the trick.

I always thought that was a weird design flaw with these trailers myself. We used a Burley Solo.
Folded up towel worked for us....plus you never know when or for what reason a towel WILL come in handy with a two yr old ;).

i don't know why i didn't think of a towel. i'm going to try it on the next ride... thanks guys

I don't have my 2.5 year old strapped in tight enough to press her back against the seat. It gives her enough room to be upright. While researching trailers I found a Trek trailer video on youtube that left space in the seat for helmets (which I don't have). A new trailer aside, when my kid isn't crying I just assume she's happy and I don't think it's really a problem for her.

We switched to helmets that don't stick back, local bike shop recommended them, Bren brand.