I LOVE this bag!

This is the best investment in a bag I have ever made. It looks brand new and I have had it for almost 8 months. Its waterproof, durable, and I can fit a lot of heavy school books into it. The strap is thick and comfortable to strap around your body. I love having it on my bike rides to the grocery store, because you can fit so much into it and not have to put plastic bags on your handle bars and hope they don't break on the way home!LOVE IT. I plan to get a smaller one for shopping and travel.