I *just* bought a used Icon backpack. Wish I had seen this first. They are currently $25 on Amazon. They look nice and big, but there are no reviews and almost no info. I am assuming there is no chest or waist straps and it's not at all waterproof? How does it sit on your back when riding? With no straps does it move around?
Speaking of reviews, in the video you talk more about your oil filter than the backpack itself. Other than it carries lots of stuff, can you actually tell us something about the backpack? If I ever need a 2nd I can strap the Icon to the seat and pick up one of these possibly.