Camelbak Classic 70oz Hydration Pack - The Classic is perfect for first-time hydration pack users or even for the seasoned performance cyclist. With direct access to the Omega HydroTanium reservoir, the Classic is now even easier to use and clean. Its a great minimalist pack, offering 70 ounces of hydration 100 ounces for the International version. External fill 70 oz / 2 L capacity OMEGA HydroTanium Reservoir with Lifetime Warranty, Insulated reservoir pocket keeps liquid cool for hours, Low profile design wont interfere with helmet, Soft mesh harness and slit mesh back panel for comfort and breathability, Zippered slat pocket holds keys, ID, and cash, Sternum strap for added stability, Reflectivity on harness & pack increases low-light visibility, Secure bungee cinch system holds extra layers.