We acquired two of these bags for our Long Haul Folding Kayaks Mark II Quattro kayak: the 35 Liter Long bag and the 35 Liter Wide bag. The “long” bag fits perfectly into the bow of the boat, and the “wide” bag fits perfectly into the stern.
We have used them on a three-week kayaking trip through the Bahamas’ Exuma chain of islands, and a two-week trip through Palau’s Rock Islands. We have had no leakage or tears, dispute somewhat abusive treatment. So far, these bags are winners.