CamelBak Light Bike Hydration Pack 70oz, Gunmetal, 2L 。Brand New Fully Authentic Perfect Condition 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 Integrated Tool Organization Secure Zippered Pocket: Perfect for keys, phone, or other essentials Bungee Overflow: Quickly stash or shed an extra layer Adjustable Sternum Strap: Offers a range of adjustments for a custom fit and increased stability Tube Trap Management: Keeps your tube secure and accessible when you need it Light Loop: Clip on a light to make the ride to and from the trailhead safe Helmet Carry: Stow and secure helmet Reflectivity: For low light safety