I purchased this online and tried it on once, but the size didn't fit, so I'm selling it. Retail price: ¥4,510 Material composition: Body: 100% cotton; Mesh: 100% nylon Closure type: Button Fit type: Adjustable Head circumference: Approximately 59cm-61cm; Height: Approximately 9cm; Brim length: Approximately 6cm As the product name suggests, the sides and back feature highly breathable mesh in the same color. This hat also retains its other key features: a soft material and a two-stage adjustable button-style adjuster belt. Body: 100% cotton; Mesh: 100% nylon; Made in Korea (fabric made in Japan) Unlike the brims of regular work caps, this one has a wire in the brim so it can be raised or lowered. The appearance changes depending on whether the brim is up or down. Leave the brim down for a subtle glimpse of the pattern, or raise it to fully display the pattern. Try wearing it in different shapes to suit your mood. Uses safe and reliable Japanese-made fabric. Quality is confirmed by all inspection organizations, and the high-quality Japanese-made fabric has cleared all standards for items such as light resistance, washing, and strength. The fabric is characterized by its resistance to fading even after long-term wear. Keywords: Hat, cap, work cap, mesh cap, men's, women's, unisex, large size, big size, short brim, short visor cap, sports, outdoor, black, navy, green Lightweight and cool comfort is thanks to the side mesh. The reason it can be worn comfortably without your head getting stuffy is the mesh on the sides and back.