Sombra is an safety accessory for your bicycle that reduces the risk of riding at night. By diffusing the light emitted from your tail light, Sombra both eliminates the blinding effect to other drivers or cyclists, as well as grant the cyclist with side-visibility (as opposed to just front and back visibility). Sombra is ideal for urban biking at night, or under bad weather conditions. Sombra is made out of polypropylene which is ideal for light manipulation as well as durability and aerodynamicity It costs just a few bucks and ships worldwide. Sombra fits almost every brand of bicycle and you can purchase it online on this website.