This bag is made by Linus and sold by Urban Ultralight. It's made of 16 oz treated canvas and features a coated base for extremely durability. It easily attaches easily to a panier rack, and has a removable shoulder strap, magnetic closure, and includes padlock. Urban Ultralight's mission is to double the number of US bike commuters from 1 million to 2 million by 2020. The company makes its own vegan wallet and resells animal-free products for bicycling and light urban living.