All-natural, these packs are activated by oxygen, providing hours of radiant heat. And they stay warm up to 8 hours. One size. Sold in pairs.
![Ergodyne N-Ferno Warming Packs, Hand, 6 1/2 in x 2 3/4 in, Non-Woven Fabric Polyethylene, 40/CA, #16990 Ergodyne N-Ferno Warming Packs, Hand, 6 1/2 in x 2 3/4 in, Non-Woven Fabric Polyethylene, 40/CA, #16990](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/249189/353954/150-16990__66059.1595344445.jpg?c=2)
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