The scicon double wheel bag holds two wheels and is constructed out of heavy duty nylon material the wheel bag features rigid hub guards stitched to the exterior for extra reinforcement featuring two handles for easy carrying and a 180 degrees zipper opening for comfortable loading compatible with 26 650b 650c and 700c wheels the wheel bag does not contain any foam padding and is not recommended for air travel but has rigid hub guards to prevent tears or scratches during transport a g