There are usually a few places that sell the NM waterproofs. They work well, but lack volume, especially if actually underwater with them. Your loudest waterproofs will the the yellow ones from Hungary on ebay, cuz they use actual speakers, that are waterproof pod like things, they have also been being sold from a Large US company, as LS Pelsos, but i think they've been out of stock for awhile. These kinda lack slightly on mid tone compared to the rest of their tone range and don't sustain function underwater once water enters the muffs. They may have also made piezo versions, not certain. The gray ghost II's sound great, are louder then the NM's and fit great too. Having taken apart many pairs of GG's, sometimes they appear to have been made very quickly, rather then carefully, but they warranty any issues i believe. Recently got m10 connectors and converted my Patriot headphones, for equiniox', to work with my Anfibios. They are in their own class, nothing compares. I did have to pay way too much for the connectors, for shipping, on ebay, cuz I couldn't find them anywhere in US, but am very glad I did.
