Fly Racing Black XC100 Hydro Pack - 28-5202 Construction: HydraPak brand BPA and PVC free 100 fl. oz./3-liter Elite? reservoir with large slide top opening Plug-N-Play? quick disconnect for convenient tube removal High-flow Blaster? bite valve self-seals after each sip and features a twist on/off bar to prevent leaks when not in use Chest Harness system with hook loop elastic bands for flexibility Features: Stowable outer mesh carry-all flap Front pocket for smaller accessories Main compartment with two inner pocket sleeves Cell phone compartment Key clip Reflective branding and zippers Fit: Fine-tune attachments on side straps allows a custom fit for smaller riders Larger quick release buckles for easy on and off with gloves Strap length adjustment from the inner main compartment with Tensionlock buckles