The Puck’s volume can be adjusted from 2.5 liters to a roomier 4 liters using the full circumference zipper, allowing you to expand the bag for extra capacity when you need it, and zip it down to a more compact storage solution for shorter rides. Mounting the “Puck” is easy, just set it on top of your metal tank and the 4 strong magnets will hold it securely in place.Each Puck tank bag is constructed from sturdy nylon material with a water resistant PVC coating. The convenient map pocket is perfect for journeys into unknown territory, and the included waterproof rain cover has a clear panel over the map pouch for all weather visibility. Cable ducts are provided to route wires for navigation systems, communication systems or headphones to ensure you stay connected while your device stays protected and dry.A carrying strap is also included making it easier to tote while off the bike. The “Puck” tank bag retails for $80.To learn more about the Held “Puck” tank bag and other motorcycle luggage, backpacks, gloves and rider equipment from Held USA, visit heldusa.com. To get the latest on Held promotions, product news, fan only giveaways and more, be sure to like Held USA on Facebook, Twitter and Instagram.