The liner is made of polyethylene terephthalate (RPET).
The seller does not describe the "linen" sun-blocking curtains as having a polyethylene terephthalate (RPET) liner. You must dig for that information and even then, it's only stated as a "possible" material. This is misleading. So these curtains are not 100% linen. The front part is linen, the back is polyester.








