Knox Advance X CE Back Protector CE approved armor incorporates trauma lite honeycomb protection Comfortable energy absorbing armor retro fits many products The Knox TP2 is a standard shape that fits any mens REV'IT or Teknic jacket and may fit other brands as well The Knox TP2 will fit in Women's REV'IT Turbine and Women's REV'IT Ignition Jackets Measures approximately 15 in length, 11 at its widest part, and 1 in thickness.