This is the 10L model of the Martin Wing series, a standard trail running pack. I've only used it three times for light hiking. There are no noticeable scratches, and the zippers and Velcro are in perfect working order. I believe it will last for a long time. The North Face Martin Wing 10 NM61527 (L/10L) A standard model backpack-style trail running pack! A reliable model for long races and trail running, where you want to keep the capacity down! Shoulder harness with excellent fit, Martin Wing Pro type Back with breathable air mesh. Reservoir-dedicated compartment (1.5L compatible) Side main zipper that can be opened from top and bottom Zippered mesh pocket inside the main body Slit pocket with key clip inside the front pocket Bottle pocket with drawcord on the shoulder Mesh slit pocket on the hip pocket Non-slip tape on the back of the hip belt 【Size】L 【Weight】435g 【Remarks】39 x 19 x 10 cm Capacity: 10L The North Face