Fits any hydration system using 3/8'' tubing
Allows 70-100% more water flow than other brands
Internal O-Ring seals valve completely to eliminate leakage
Tough polycarbonate material that won't bite close while drinking
The Dayblazer 550 combines a focused beam of light when driving home from work after dark and lots of eye-catching pulsating light to keep you visible during the day, this light is still small enough to forget you even have it with you.