A smart key case that is easy to use with a hand-sewn finish and a playful color combination from the popular color tailored series that is made to fit the current scene. The outer leather is made of domestic cowhide tanned leather with an antique look, and further complex embossing and kneading process for a unique texture. The interior fabric uses ECOPET recycled polyester fiber to embody the awareness of Catherine Hamnet, which is committed to environmental problems.