http://shop.opticsplanet.com/yukon-o...FQeRfgodi9oD0Q

Just thought I would share this if you have a need. It is the perfect size to fit on my MP3 luggage rack. It has 3 internal compartments for separating items, or you can zip the sides and have 1 large compartment. It doesn't really say it is waterproof but the outer and inner liner appear to be, but I am thinking it may be the zippers that may leak--if they do.

It doesn't have D rings, but it has a ton of loops to attach my ROC Straps. I got mine from WOOT for $39.99 and I am very happy. I got it for general travel first, but I see where it would work great on the bike.

Disclaimer: Your opinion may vary.