Givi GRT716 Waterproof Tank Bag 6 Litre

Fits on to my bike easily and can't really see straps as placed them between front and rear tanks on bike. Fits on securely and holds a large meal deal lunch easily. Is made up of one big pocket. The only design flaw is the front strap only has one clip so can't remove the bag quickly and leave front strap in position. Like you can on other tank bags I've had in past. No need for a cover for bag as is fully waterproof so no stoping to cover it over. Fitting the back straps is very easy and probably would even come up the inside and out from under seat. On my bike the bag sits on the front part of saddle and if standing to ride doesn't interfere with movement although you do know it's there.

After trail riding and camping on weekend on my honda 250 Rally very happy with tank back, fits well and enough room for my kit.

Use this on my Triumph Tiger 800 and I think it's the perfect size. Had a much larger tank bag before, but felt it was too big.
100% waterproof. Was riding whole day with the tank bag on through a bad storm, rain, hail storm for hours. The bag kept all my contents absolutely dry. Very highly recommended.
Only con is the fact that it doesn't have any compartments inside, so all your stuff gets thrown about. I decided to use my sticky-back velcro and a bit of creativity.