Heel - High-density pad cushions ankles, reduces heel slippage. Shin - Medium-density pad takes the bang out of the bumps, protects against bruises and abrasion. Ball/Over Toe - High-density pad cushions ball, provides warmth and protects toes. Side Panels - Flat knit side panel reduces compression on the foot, enhances moisture ventilation. Content: 27% wool, 27% silk, 27% acrylic, 16% stretch nylon, 3% spandex