This is a CPH 502SL casquette. I purchased it new from the official store last year. I've used it about four times, and then had it cleaned and stored in a dark place. I'm selling it because I'm short on money. It's a popular style, along with the 575 and 530, so why not take this opportunity? I would appreciate it if you could understand that I will fold it up small for shipping. Please refer to the official description below: [Color] Black [Marked Size] M/L [Detailed Size] Inner head circumference: Approximately 59cm Brim (center): Approximately 5cm [Detailed Information] CPH / CPH 502SL SYNTHETIC LEATHER CAQUETTE / BLACK (502SL Synthetic Leather Casquette / Black) A new model using SYNTHETIC LEATHER has appeared, using the popular 502 type casquette, which is suitable for wearing backwards. 1. The fabric used is "Fai-Clam Skin," a familiar fabric for CPH, and as the name suggests, it uses synthetic leather that imitates lamb leather, not cowhide. Synthetic leather that imitates regular cowhide often has a strong stiffness and a large grain, giving it a rugged feel, but as the name "lamb leather" suggests, it has a soft feel that clings to the hand, a semi-glossy sheen, and reproduces the fine grain unique to lamb. I have seen various synthetic leathers so far, but regarding this fabric, it doesn't look cheap, which is typical of synthetic leather, and I was satisfied with using it. 2. About the brim The brim's core uses Pef material, which is familiar as a light and soft core. The Pef core can be folded, which is a nice point because it's easy to handle. 3. About the lining The lining uses "COOL DOTS," an environmentally friendly cool stretch fabric developed by "Komatsu Matere," a world-renowned cutting-edge fabric manufacturer. It is a 100% polyester mesh fabric with countless microscopic air holes that cannot be seen with the naked eye, and is used in various apparel scenes as a mesh material with complex functions such as breathability, water repellency, water absorption, and quick drying. It's a slightly luxurious material to use for a hat, but I decided it was the most suitable fabric to reduce stuffiness. * The inside of the hat has an adjustment adjuster that can reduce the size by 2-3cm.