Black Diamond Vision Helmet S/M Purchased this summer and used once for hiking. It wasn't a very strenuous mountain, so it was barely used. This is Black Diamond's most robust helmet model. It combines EPP and EPS foams with an ABS shell to achieve both lightness (220g for S/M) and durability. In addition to new side and rear protection that meets UIAA standards, it features ventilation ports to enhance breathability in hot weather. There are minor scratches, but they are not noticeable. I believe they occurred when it was stored in the car. Please refer to the photos. - Brand: Black Diamond - Model Name: Vision Helmet The size is S/M (53-59cm).