|If you are looking for a durable interfacing or interlining that adds body to fabric crafts such as purses, tote bags, halloween costume hats, etc. try using nylon replacement screen.
It is washable, and lightweight, yet it has body, and wont get limpy. It comes in nylon, polyamide, and polyester. Each with a different stiffness. You can find it in rolls at the hardware store or Home Depot. Sometimes you can find a variety of mesh sizes too!