I do mountain biking and lots of hiking. For years I used an Osprey bag which was super light and had lots of features. Problems was that it was hard to clean

I do mountain biking and lots of hiking. For years I used an Osprey bag which was super light and had lots of features. Problems was that it was hard to clean, the fabric/zips were not strong enough and it was difficult to load. Now I just use a backpack designed for a laptop. The material is easy to wipe clean. It is rectangular which makes it far easier to load stuff than the weird semi-cylinder shape. The material is string and the zips are much more meaty. And the flat rectangular back is very comfortable for me.