Black Diamond Vision Helmet S/M Purchased this summer and used once for mountain climbing. I didn't use it much because it wasn't a very challenging mountain. This is Black Diamond's most robust helmet model. Combining EPP and EPS with an ABS shell achieves both lightness (220g for S/M) and durability. In addition to new side and rear protection that meets UIAA standards, it has ventilation ports to improve breathability in hot weather. There are some minor scratches, but they are not very noticeable. I think they were made when I put it in the car. Please refer to the photos. - Brand: Black Diamond - Model Name: Vision Helmet Size is S/M (53-59cm).