Lenzing FR®, a cellulose fiber from the house of Lenzing, protects against heat stress. Produced from beechwood, a natural raw material, Lenzing FR® offers protection against heat and flame in a variety of different applications. Around the world Lenzing FR® is produced using the Lenzing Modal® process. This ensures that the very highest fiber tenacities are obtained and makes it possible to insert the FR agent in a permanent manner.