A hidden gem from Muji. Discontinued Dark gray Used only once for a short time during a business trip. Ships via Yu-Packet Post Mini. Cotton Welder Series made with waterproof fabric. This is a card case suitable for storing IC cards, etc. The card compartment has a zipper, which makes it difficult for cards to fall out and also provides water resistance. Regarding the characteristics of the fabric: standard "water-repellent" fabric repels water droplets on the surface, but water may seep in and bleed over time. On the other hand, "waterproof" fabric has the function of preventing water from entering, without absorbing it even when water is directly applied or submerged. "Welder" refers to products made by welding without using thread. With items sewn with thread, water can seep through the stitch holes, but this series is finished by welding, making it more water-resistant. *This does not completely prevent water from entering.