Soft TPR (Thermo Plastic Rubber) with a deep face mould for a comfortable fit with an excellent seal Dual wide elastic connected with a pin swivel connector, adjustable and with a quick release toggle Efficient exhalation mask For use with the DHCT twin unifit filter cartridge system Dual wide elastic, connected with a pin swivel connector, adjustable head strap and a quick release toggle PRODUCT RATING NRCS AZ2011/46 COMPOSITION Soft TPR (Thermo Plastic Rubber)