I purchased this product to reproof an expensive North Face Jacket. After carefully following the instructions and ensuring all old detergent was removed from the washing machine the jacket was washed and then proofed. After the washing machine it went into the tumble drier on a low heat. I have not used this jacket in the wet since treating it but placing an arm under a running tap shows water to bead and run off. My next long distance walk in rain will show how well this product has worked.
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