Extra THORLON® provides a maximum tennis density padding to provide better durability, protection against shock, impact and shear forces. THORLON® top with added spandex provides protection and better fit. Lightweight padding in arch for better fit and arch support. Extended lightweight padding over toe to protect against fast stops and starts. Provides the maximum protection for the most rugged and challenging activities and weather conditions. If you're not fully satisfied with your purchase, you are welcome to return any unworn and unwashed items with tags intact and original packaging included.