Carhartt 28L Nylon Cinch-Top Convertible Tote Backpack

Bag is exactly as described. Plenty of space a the quick cinch at the top is a nice feature. I wouldn't mind if there was a pocket for the tote straps built into the rain cover but that's a minor detail.

Field site & city in one ??

This bag is so versatile. We took ours to the beach knowing the water-resistant nature of it would stand up to the sand and water. I love the huge tall pockets to fit our 32 oz water bottles and all the spots to clip keys or anything equipped with a caribeaner onto. I also love that it has two longer handles so if you want to carry it as a tote instead of a backpack, that's an option and the cinch top is awesome because it lets you fit so much more in because it doesn't curve like a typical backpack does. I wouldn't mind having one more zipper pocket on the inside of the bag but I used the one on the outside for my phone. When I'm not traveling, I use this for carrying groceries!