This is a Grivel Stealth helmet. I purchased it in 2025 to climb Mt. Oku-Hotaka. (I wore it when attacking Mt. Oku-Hotaka from the Karasawa Cirque.) I used it only once and haven't used it since. (I wore it over a cap. Also, I disinfected the straps that directly touched my head after wearing it.) I'm selling it because the size doesn't fit me well. I will also include a Millet helmet holder that I bought at the same time as the helmet. (I also used this only once.) There is a small scratch on the back of the head (see photo 2). Other than that, there are no noticeable scratches. It doesn't affect wear at all, and I think it's generally clean. This helmet has only experienced Mt. Oku-Hotaka, but I would be happy if it could experience the scenery from various other mountain peaks. Thank you. [Product Information - Quoted from the purchase source] Hyperlight, hyper-ventilation. The back of the head has a simple fitting system for easy handling. A 20mm thick polystyrene pad absorbs impact. Japan Fit standard. ● Material / Shell: Polycarbonate, Liner: Polystyrene foam ● Size / Head circumference 55-61cm ● Weight / 200g