Product description:

Serfas' Magnetic Stem Bag is excellent for commuters, tourists, triathletes, and everyone else, because it lets you keep food and gear where you can easily see and access it (the bag sits just behind the stem, on the top tube). This bag quickly attaches to your frame and stem with two Velcro straps and has a mesh top (solid top available in Black) with a magnetic closure for easy access to your gear.