John Patrick Cuaycong sent these to me to try out last year. I have given them a huge workout and they have come up [b]very[/b] well. They are not 100% water proof. If you swim a lot they will get a few drops of water inside but for so called waterproof GPS they are pretty close to ideal for me. This is the one specifically made to size for the Navi GT-11/GT31. I can wear it on my forearm just below the elbow so I can see it as I sail or up on the bicep by adjusting the Velcro straps. Easy to adjust and when it is just right it can be slipped off the arm and slipped on for the next session without adjusting. I a few big crashes I have had it slip down my arm but it usually stops at my wrist. Even if it comes off it floats well. I believe John change the brand name after he sent me the sample.
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