Melt-blown fabric ,Three layers of filter effective protection Efficient melt-blown fabric ignition point is quite high, The ordinary fire won't light.
1200mm Aluminum Housing LED Emergency Strobe Warning Light Bar for Ambulance Patrol Emergency Vehicle Police LED Warning Lights Amber Lightbar for EMS Fire
• Reflective stripes on both front and back for maximum visibility and safety at night.• Size: M=Waist 34.6"-40.2"• L=Waist 36.2"-41.7"• XL=Waist 37.8"-43.3" (optional)• Available in hi viz orange or hi viz yellow