●Materials: [Front of Head] 100% Polyester; [Back of Head, Brim] 100% Acrylic; [Pom-pom] 100% Polyester [Actual Size] ●Free Size Details: [Head Circumference] 55-57cm; [Brim Length] 7.5cm ●Head circumference adjustable ●Price: ¥5,830 ●Product Description HEAT NAVI: Light to Heat. +5°C. The main feature of the proactive insulation material "HEAT NAVI" is that it converts light into heat. Carbon-based inorganic substances absorb almost all wavelengths of light without waste, efficiently converting light into heat and achieving comfortable warmth. A cap with a winter-like texture that combines wool material and knit. The lining uses "HEAT NAVI," which converts all light into heat and has a +5°C heat retention function, making it an excellent item for cold protection.