Muji Black Safari Hat. Breathable, water-repellent, and uses waterproof tape, making it ideal for rainy days and outdoor activities. Quoted from the official website: ----------------------- Uses fabric with UV cut function. It has a 3-layer structure with water repellency, breathability, and skin separation functions from the surface. 【Recommended points】 ・Uses fabric with a UV cut rate of 90% or more and UPF 50+. ・Size can be adjusted with the inner belt. ・The fabric has a 3-layer structure, with water-repellent treatment on the surface and breathable fabric in the middle layer. By attaching waterproof tape on the inside to prevent rain from entering, it can be used regardless of the season or weather. ・The chin strap has a safety design that detaches when both ends of the parts are pulled. ※Brim length: 7.5cm