I purchased this seat bag to replace a Blackburn bag I've used for years. I shopped other brands but decided on buying a Blackburn bag again. I went with the large size, its a bit bigger than I need but still not too large. The water resistant material, practical inner design and great zipper all are nice features. This bag also secures tightly - no worries of it becoming loose. In use for a couple months, no complaints. Great looking bag as well.
So, I live in a forest with a mile of gravel road to get to asphalt. That led me to get a gravel bike (bike number 8). Then I needed a water bottle cage - my gravelly was a lightweight Specialized Diverge - in black - and the Blackburn Bottle cage was PERFECT! It works like a champ. I have used Blackburn products in the past with little to no disappointment, where they have exceeded expectations and this bottle cage is no exception!