Any recs for breathable head support for my 3.5 month old?

We live in Texas and it's already getting into the 90s and soon it'll be in the 100s and poor DD gets SO sweaty with the insert that came with the Graco Snugride 35 that we have. It's velour on the head part and there's 2 little side pillows that are also velour and after a 15-20 min ride, she is usually pretty sweaty and her hair on the back of her head is usually soaked. I took it out to run some errands today and she wasn't sweaty at all, but her head was tilted to the side when she fell asleep. Didn't look very comfy! Any suggestions?