Fox Flexair 6 Inch Merino Socks - S-M - Moss Needs Images The cooling fins can be

The cooling fins can be seen sitting at the top of the brake pad (above the braking surface) and tests have shown they work tremendously

they sure are

82% Nylon 18% Spandex

Ventilation is further heightened with a special perforated elastic on the leg grippers

8mm clamp for the bars

Fox Flexair 6 Inch Merino Socks - S-M - Moss Needs Images The cooling fins can bePerformance riding made for miles of comfort When you know you're heading out for a full pull, you want your feet to stay comfy all day. The 6" Flexair Merino Socks are lightweight and breathable socks that are 100% up to the task. The compression arch bumps up the comfort stakes, as does the seamless toe closure. With their rib knit upper, these socks won't fall down, even if you do. Merino wool construction Mesh zones provide added breathability