Free Knot SOL FIBER® FOURON Full Cover Warm Cap II Brand new, unused item. I think it will be useful for snowboarding, fishing, and various other situations. This item is sold out immediately on the official website. - Brand: Hayabusa FREEKNOT - Color: Black - Design: Cap with ear covers - Style: Fishing cap Size: Free Y3231 Price: ¥7,700 SOL FIBER absorbs far-infrared rays such as transmitted sunlight and body heat, generating heat. This radiant heat creates a cycle of heat circulation. It will be shipped in a compact form.