Ergodyne says their N-Ferno 6900 Warming Vest with NobleTek Insulation provides remarkable warmth, comfort, and flexibility, without the added bulk of natural or synthetic fiber. The vest uses flexible, airtight, yet breathable chambers filled with Argon gas. The 4.5-mm layer of Argon has the same thermal conductivity as 14- mm of the best synthetic or natural fibers on the market. Additionally, the insulation allows adjusting custom level of warmth with the turn of a dial for workers in cold environments.
Ergodyne
www.ergodyne.com
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