This product is 100% as advertised. It is fully waterproof/submersible. A zip might be easier to work with, but it's great for a waterproof zip... it's kind of a compromise to be prepared for. Why 3 stars? Simply the price. Undoubtedly, the entire Run-Off product line is overpriced. I wish I had more of these, but at over $30 each it's not worth it. If Nite-Ize sold this for half the price I would replace all my travel and car bags with these. There are simply too many viable and affordable alternatives to be worth the price for the average person. For the most important things I will use waterproof ziplock bags.
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