Lightweight and Durable Materials Air Support™ Light Back Panel:    Designed with body mapping technology for efficient ventilation and lightweight comfort Ventilated Harness:    Lightweight and breathable Secure Zippered Pocket:    Perfect for keys, phone, or other essentials Helmet Carry:    Stow and secure helmet Adjustable Sternum Strap:    Offers a range of adjustments for a custom fit and increased stability Reflectivity:    For low light safety Light Loop:    Clip on a light to make the ride to and from the trailhead safe Tube Trap Management:    Keeps your tube secure and accessible when you need it Pack Weight:   6 oz Hydration Type:   CRUX™ Reservoir with Standard Exit Port Torso Fit Range:   15-21 in Gear Capacity:   1L/60 cu in Hydration Capacity:   1.5L/50 fl oz