Salming race r2 30 mens indoor court shoes these salming race r2 30 mens indoor court shoes features an ergoheelcup which helps to stabilize and fixate the heel which is key to providing a great fit and comfort other technologies include rebound foam which helps provide 80 better rebound energy compared to a regular midsole padded and shaped ankle collar provides supreme comfort whilst the non marking sole provides great traction indoor court shoes padded and shaped ankle collar