Many things can ruin your ride, but some are in your control. When you constantly bite and use your hydration pack's bite valve, it wears, gets gross, and will eventually fail. Not to fear, Osprey’s Hydraulics Bite Valve provides a high-quality replacement for your old, neglected and beat up bite valve. The bombproof ¼ twist shut-off design guarantees you won’t experience any unpleasant wet surprises. You'll be surprised, replacing your bite valve before things go wrong is not only smart, but the action also makes you feel better, and more assured as you teethe your way down the next trail