"Our Twlight Woven Dimout flame retartant lining is produced to the highest standards for performance and consistency, with an unrivalled softness and drape. Use either as lining or interlining to reduce pinholes on Roman Blinds or curtains. 300gsm. Conforms to BS 5867 2: 2008 Type B & C. M1, B1, Class Uno, NFPA 701. Statement of conformity: This product has been independently tested and achieved a ‘Pass’ under the relevant legislation. Certificates available on request."