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This is NOT something you want in a survival situation, especially if you have been spending a lot of time in your boots, trudging through mud and wading through dirty water. My last big bout was following the Tough Mudder, and this product really sped up my recovery, I feel. The active ingredients are a mixture of organically derived materials including: flavonoids such as the Vitamins A, B3, C, D, D3, and K2 and Ubiquinol . More details can be found on their product data sheet including bactericidal and fungicidal testing performed.
They key thing however, is that it a topical spray, applied before booting-up, that acts to give your beleaguered skin a fighting chance.