☞ Genu Valgum (Knock Knees). ABOUT OX TYPE LEGS CORRECTION HEEL PADS. These XO Type Legs Correction Heel Pads may be suitable for people dealing with ☞ Genu Varum (Bow Legs). FEEL THE DIFFERENCE. ☞ Design for Genua Varus, genu varum, bandy leg, Genu Valgum, knock knee, baker leg, Valgus Knee.