Key features: Form fitting and breathable back panel that provides ultimate stability and comfort. Adjustable waist straps provide unparalleled locked in fit, preventing the bag from bouncing around while moving through rough terrain. Two external pouches for water bottles or other accessories with integrated mesh collar to ensure your cargo stays put on the trail. 3L capacity for daily essentials with external drawcord that can be used to secure a jacket. Front valuables pocket. How to wear: On your waist on the trail, either under or over a t-shirt