Maybe this isn't the place to ask this question but know that someone will be able to answer me. I recently saw a car seat pillow (for grandson) and they used shredded foam to fill it. Any suggestions of what I could use besides the shredded foam. I am worried that the shredded foam wouldn't wash/dry easily. I was thinking of a rolled towel covered with a flannel that could be easily removed. Any other suggestions? It looked like it would be really helpful for those trips and the nodding heads of a little one.