skarpety fox flexair knee brace sock dark shadowThe Fox Flexair Knee Brace Sock in Dark Shadow is a motocross sock designed specifically for use with knee braces. Its extra high construction, thin material, and strategic reinforcements make it ideal for intense riding in demanding conditions. Product features: Special design for wearing with knee protectors Length that allows the sock to be folded over the protector Large mesh panel for better cooling Thin, lightweight material: polyester spandex