Ergodyne’s new N-Ferno 6900 vest employs a breakthrough warming system. Instead of trapping dead air in thick cells, the 6900 uses flexible, airtight, yet breathable chambers filled with Argon gas. The 6900’s 4.5 mm layer of Argon has the same thermal conductivity as 14 mm of the best synthetic or natural fibers currently on the market.
www.ergodyne.com
