Extra cushion protects feet & legs from the bumps & jolts of a long tour. Moisture wicking keeps feet dry & comfy. Sure fit reduces slippage/bunching. Mesh panels vent moisture while trapping heat. Cushioned shin for extra padding against boot lacing. Fully cushioned foot absorbs shock and insulates. Reinforced toe and heel add comfort and longer product life. 76% acrylic, 22% nylon, 2% spandex. Mid-calf length, heavyweight.