Attachment loops let you store your trekking poles when not in use Back panel is made of air mesh for a comfortable, breathable hike or ride out on the trail bluesign is a strict international criteria that ensures the protection of workers, consumers and the environment Front pocket allows you to quickly stash gloves, a rain jacket or a beanie when the weather changes quickly Hydration hose includes our patented magnetic system that snaps it back into place on the shoulder strap after you drink – easy to access when you need it and out of the way when you don't Interior zip mesh pocket provides secure storage for smaller items