Fabrics are muslin on the outside and inside a cotton print on the inside. The interior print will vary from cozy to cozy, if you have preference for a certain colour or theme let me know in the notes to seller and I'll try to accomidate.
Button and elastic closure means it fits disposable cups from places like Starbucks & Tim Horton's.
Machine washable but I'd recommend a quick rinse in the sink and hang to dry.
Currently I am making these order by order. Be aware it may not look exactly like the one in the photo as I'm stitching each one by hand.