A handbag designed for an Italian online platform “up to you anthology”, specializing in bags. The brand is unique in that it is not limited to professional designers and is open to design proposals from anyone, and provides total support from product development to manufacturing management and online distribution. The bag was designed as a single laser cut sheet of leather died with plant derived tannin that can be distributed completely flat. Without any tools customers can fold and assemble it into a three dimensional bag, just by joining a few rivets through the holes of the bag. This simplified the manufacturing process and minimized inventory and shipping cost, allowing a rich collection of various colours, sizes and shapes. Because of its form, this bag can be counted as one sheet, two sheets, or, in Japanese, ichi-mai, ni-mai, and so, the bag was named “mai”.