Product Description As the name "carbon leather" suggests, it is leather that combines carbon and leather. It uses cowhide from calves aged 6 months to 2 years old as the base, and an extremely thin carbon pattern film is heat-sealed onto the surface. Therefore, it has a supple firmness similar to kipskin while also being resistant to friction, light, and heat. Furthermore, it can be said to be a material that is also resistant to sweat and water. Because it is processed with advanced bonding technology, the cowhide and carbon film are unlikely to peel off. It is a high-performance, hybrid leather unlike anything before. Carbon is made by applying 1000-degree heat to acrylic fibers and carbonizing the fibers, which are then bonded to cowhide with high heat. By attaching or weaving in carbon, a unique texture is created, and it is used in backpacks, shoulder bags, wallets, and more. Materials Exterior: Cowhide carbon leather Interior: Leather board (recycled leather) Storage Bill compartment x 2 Card slots x 4 Coin purse x 1 Free pocket x 1 Product Size Height 10cm x Width 11.5cm x Depth 2.5cm Card slots may be tight until the leather is broken in.