Cuddle Buddies

Hello,

I'm a relatively new chinchilla owner and I was wondering about cuddle buddies for my chinchilla. I have one chinchilla, less than a year old, who I think would benefit from a stuffed cuddle buddy. I was looking online and it says that fleece buddies were ideal but on every website I looked with a fleece buddy it doesn't say what's stuffed inside the fleece. I'm afraid the inside will be stuffed with cotton and I know that is terrible for chinchillas if digested. Does anyone know what is inside a fleece cuddle buddy?

Thanks!