Ideal for cold weather work and recreation, NFerno Warming Packs heat up in seconds and provide continuous warmth The selfcontained packs add heat anywhere when exposed to air To activate, simply open the pack Allnatural ingredients heat up when they contact oxygen Seal from oxygen in ZipLoc bag and reuse the next day Environmentally friendly hand warmers keep your hands warm up to 8 hours They are great for construction, freightbaggage, drillingmining, oilgas refining, ironsteel work, deliveryservice, landscapinggrounds, cold storagewarehousing and material handling
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