Perfect for gravel, MTB or even the commute, the Jet MTB offers a high-quality environmentally-friendly bidon with an added cover for less than immaculate conditionsHigh flow valve, originally used on the Fly, delivers fluid almost twice as fast as the previous Corsa design,Body of the bottle is thicker than the Fly and more robust for daily use but still competitively light and easy to squeeze,Integrated blow-off valve feature greatly reduces the chance of a dropped bottle taking down a rider, making this a safer option for racing, sportives or group rides,100% biodegradable, entire bottle, including the cap is compostable and will return to the elements once buried in earth thanks to the corn - rather than oil - based plastic,Dishwasher safe and BPA-free.