KASK Protone helmet, lightweight and breathable design. - Brand: KASK - Model Name: Protone - Size: 59-62cm, Large - Color: Black/Yellow This was a gift from an acquaintance. Details about the brand are unknown. This information is only what was written on the helmet, so please use this to judge. My acquaintance also purchased it cheaply at an auction and said it was used accordingly. The yellow parts are faded, and the leather on the chin strap is also deteriorated. I am selling it because the size didn't fit me! Please check the photos. I was told that there were no crashes, and although there are minor scratches, it can be used without any problems. Please use it if anyone needs it. Thank you for looking.