timtex is the same stuff in the brims of baseball caps. it is washable- does not shrink- is sewable (easy to sew) you can press it- i use it alot- with fusable's for fabric bowls- buckets- & baskets. purse inserts, and lots of postcards.
it can be purchased in packages, by the yard or by the bolt. is 18" wide. if you search timtex you will find lots of places that carry it.