These are made of previously loved Japanese kimono or kimono obi (sash) fabrics.
I believe in giving previously loved textile items new lives by remaking them into something else. Since I enjoy making bags and pouches, I often remake them into this kind of pouches. The ones on the left are made of wool fabrics from kimono (yes, not all kimono are made of silk), and the ones on the right are made of obi (these are silk).