Grass, hard or clay court? …. It doesn’t matter with the 3sixty grip sock. The extra grip that the sock gives will only help movement, speed and agility around the court. Eliminating slip in the tennis shoe is achieved by using an interlocking material on the inside and the outside of the sock. When your foot grips your sock and your sock grips your shoe you know that you can have complete confidence in your traction,movement and power.