This is the Paagoworks Rush R5. I purchased it at the beginning of the year and used it several times. I am selling it now because I am using something else. You can adjust the size with the shoulder straps, side parts, and chest vest, so you can adjust it to your preferred fit. There are no problems with use, but some of the Rush print logo has peeled off. Please check the images. - Color: Black/Green - Material: Mesh - Features: Lightweight, good breathability - Size: Free size - Uses: Trail running, hiking Thank you for looking. Size... ~10L