They are mostly calicoes and fortunately cotton. The only polly blend ones that I have are gingham and they seem like they are maybe part polly cotton but I have only used those for myself. Thanks for the heads up elisabrat on using them. I think they are very cute retro and my adult daughters like the fabrics and calico prints. I am thinking of making one quilt atleast using all those fabrics plus using Mountain Mist batting. sounds so comfy and homey. LOL