hi there! You could just use regular apparel lining, it’s usually made of acetate and is lightweight but I usually prefer not too because I find it static-y, too slick, and not very breathable. Instead, I prefer to use another lightweight material. If you have a JoAnn’s near you, I would check out their Silk Essence, it’s usually in the formal apparel section but on its own shelf. It’s polyester but lightweight, silky, doesn’t wrinkle and fairly easy to work with. Here’s a link to it online: http://www.joann.com/sew-classic-silky-solid-silkessence/prd7633.html Good luck!