Product information “KPNP E-Socks with proximity sensor – WT recognized” KPNP E-Socks with proximity sensor – WT recognized Foot protector with proximity sensor, ergonomic design. Front and back with encoded pressure sensor. Continuous hit detection and response. The software can be downloaded from: http://en.kpnp.net/35 Size: 36, 37, 38, 39, 40, 41, 42, 43, 44, 45