Permanent Flame Retardant Daniel has everything you need for a good flame-resistant curtain. Thanks to the yarns woven from flame-retardant fibers, your Daniel curtains are permanently flame-retardant even after rubbing and washing time after time. Material: Polyester Pattern: Linen Texture Light Blocking: 70%-80% Fabric Weight: 390 GSM Size: Made-to-measure (custom width & length)