M-Wave downtube battery cover This downtube battery cover from M-Wave protects your e-bike battery against bad and cold weather. In addition, it ensures that the battery is less likely to be damaged and the capacity of the battery is improved due to the insulating effect. The cover is suitable for Bosch and Shimano frame batteries. Specifications: Color: black Material: neoprene Type of bicycle: electric bicycle Suitable for: Bosch and Shimano frame battery Thickness: 4 millimeters Recommended use: temperatures below 15 degrees Mounting: Velcro