HAT LUMBERJACK RED（スポーツキャップ ランバージャック レッド） Apparel Size:One Size navy blue (royal blue) was

navy blue (royal blue) was considered an auspicious color by samurai and known as "kachiiro" (victory color)

In other words

we recommend choosing one size larger

comfortable and fits snugly to your head

so if in doubt

HAT LUMBERJACK RED（スポーツキャップ ランバージャック レッド） Apparel Size:One Size navy blue (royal blue) wasThe OTSO Cap is perfect for winter activities like running, walking, and skiing. It protects your head and ears while you're outdoors on cold days, while also keeping you dry and comfortable during exercise. The fabric is made from a blend of stretchy nylon LycraSport and polyester, providing the perfect combination of breathability and moisture wicking properties. Key Features Fully EU produced Temperature control function High breathability High