The YewdaleDefiant^® Laser Material provides protection from stray laser radiation and is available on a full spectrum of YewdaleDefiant^® roller blinds. Designed to be used as passive guards in all areas where Class 3B or Class 4 lasers are regularly in use. Laser fabric DIN EN ISO 25980:2014 and is classified in fire protection class B1 (hardly inflammable) according to DIN 4102-4:2016-5