The 3M™ High Heat Accessories comprise the 3M™ Radiant Heat Covers M-973/M-975, 3M™ Gold Over Visor M-967, 3M™ Over Visor Frame M-961 and 3M™ Breathing Tube Cover BT-927. These provide additional radiant heat and spark/molten metal splash protection to the 3M™ Versaflo™ M-300 and M-400 Series Helmets and 3M™ BT-Series Breathing Tubes.
Standards and Approvals The Radiant Heat Covers M-973/M-975 and Breathing Tube Cover BT-927 meet the following performance requireme









