I started out using a Detours backpack since it had the mesh panel & frame to allow airflow between back & the pack. It really did not help that much as I always would have a sweaty back after by 16 mi commute. I then moved onto the Arkel Commuter pannier bag, which I like ALOT. What nice is that it holds stuff better than the pack, has a laptop sleeve, and what I really like is the shoulder strap that attaches for carrrying off of the bike.