When all you need are the bare essentials for a trail run or day hike, the rev 6 will see you through. Designed for ultimate all-day comfort, the suspension system is based around osprey's innovative bio stretch body wrap harness and hip belt system. Dual chest straps maintain load stability and the breathable mesh back panel provides ventilation and a soft, irritation-free contact surface. Access the main compartment via a zippered panel. Inside, a slash pocket secures valuables. Outside, a front panel bungee provides compression and a place for a bulky layer. Stretch mesh side pockets and two stretch mesh body belt pockets provide additional storage options. Inside the pack's separate hydration sleeve, you'll find a 2.5 liter hydraulics lt reservoir with magnetic bite valve for sipping on the go. Built-in baffles in the reservoir reduce barreling and sloshing to minimize the chances of chafing over the course of a long day on the trail. And should that long day turn into a long night, the graphics are reflective to enhance your nighttime visibility. A weatherproof Digi flip media pocket drops down from the shoulder harness for quick access to your device. It is removable when you want to disconnect and fully engage with nature and the sound of your breath.