As the lightest and slimmest knee pads on the market, the Dainese Trail Skin Knee Guards offer highly flexible, ultra breathable protection from nasty spills without restricting pedaling movement or causing irritation on longer rides. Pro Shape protection sandwiches a layer of impact absorbing foam within its honeycomb like design. The result is a 6mm knee pad rated to European standards EN 1621. 1, with perforation holes for cool wearing comfort. Further contributing to its ventilated feel, breathable jersey hole mesh quickly disperses perspiration during long uphill slogs and warmer conditions. Plus, its roll down design allows extra freedom and cooling when you're pedaling uphill for long distances.