Simple, lightweight backpack made in Ohio, USA by ZimmerBuilt in black EPX200.

This backpack has a simple roll-top closure and a large mesh pocket at the front. There is no dedicated side pocket, but it has four daisy chains for lots of customization possibilities. The straps are padded and are covered with mesh for ventilation.

I ordered this backpack directly from ZimmerBuilt. Used only a short time and in excellent condition.

See photos for measurements taken flat. The size can be adjusted depending on how you roll the top, but when full it's about 18" tall, 10" wide, and 4" deep. It weighs about 350g.