Lightweight and Durable MaterialsAir Support™ Light Back Panel: Designed with body mapping technology for efficient ventilation and lightweight comfortVentilated Harness: Lightweight and breathableSecure Zippered Pocket: Perfect for keys, phone, or other essentialsHelmet Carry: Stow and secure helmetAdjustable Sternum Strap: Offers a range of adjustments for a custom fit and increased stabilityReflectivity: For low light safetyLight Loop: Clip on a light to make the ride to and from the trailhead safeTube Trap Management: Keeps your tube secure and accessible when you need it Specs Pack Weight: 6 ozHydration Type: CRUX™ Reservoir with Standard Exit PortTorso Fit Range: 15-21 inGear Capacity: 1L/60 cu inHydration Capacity: 1.5L/50 fl oz