It is not cotton

I was disappointed it was polyester and not cotton. However, it is light weight and I just go it and used it once. I think the poly cover may make it hotter. I used my other one year round as the A/C blew directly on my feet. It had a cotton cover and breathed well. This one was not weighty and felt good. I keep my house at 68 overnight in the winter and this keeps me warm.

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