Paqua is a relatively small company run by Paul Trachtenberg. Paul designed the bags to be as tough and waterproof as possible. My Paqua Mobile bag has safely carried my GPS for the last three years and kept it dry every time. It has been across Bass Strait by kayak, it has travelled 260 kms by kayak in Greenland with me, and every time I go out in the kayak it comes along for the ride, whether it be surfing (and rolling, the two go together :-) or just going for a quiet paddle. It just works.
Paqua have generously supplied their bags for use on my expedition.