HYOD inner protector, HRZ919D, D3O® AIR COMFORT PROTECT SHIRTS (onepiece). Size is L, which felt a bit large for me at 169cm and 63kg. For details, please refer to the manufacturer's website: https://shop.hyod-products.com/Form/Product/ProductDetail.aspx?shop=0&pid=HRZ919D D3O material protectors are equipped on the shoulders, elbows, back, and chest, and urethane protectors are also equipped on the sides, etc. The chest protector is a one-piece type, so it is safer than a separate type, and the diagonally placed zipper allows for full opening, making it easy to put on and take off. It seems to be recommended for snowboarding as well as motorcycles. The protectors were removed and washed before listing. It has been worn about 5 times, and there is no noticeable damage or wear, but please understand that this is a used item before purchasing.