I've been waiting a long time to get these. They are top-of-the-line Dutch style shopping/commuting panniers from Basil.
This is from the Basil site:
KAVAN II NATURAL, double rear bag, strength.,strong and water-repellent canvas w. leather,no interference heels/bag through rounded sides, cover 'Soft Filling',reflective str.on all sides,topside two leather bands for LED/straps/child's seat.I am very impressed with them. One immediately notices that they are rugged, very large, and rather heavy, but obviously made to last for a very long time and withstand the rainy Northern European climate. The workmanship and materials are very nice. As with many natural materials, I suspect that the canvas and leather will wear for ages and develop a beautiful patina as it does.
Dimension: each bag is 37*17*35; 45L
As for the down side, well they will be too big and heavy for some. Unless you really shop on your bike or need to carry a fair amount on your commute, they may be overkill. The two bags are linked by a the central straps that go over the rear rack, so cannot be used separately. And they are not cheap.
We'll be getting a few more Basil products soon, but the supply of these panniers is very limited. We probably won't get another case of them until Spring.
The second photo is of the latest VO handlebar bag prototype. It still needs some work, but it's getting there; one more prototype round should do it.