Ltpgtltstronggtthe 66fit advanced wobble cushion combines three great products in oneltstronggtltpgtr ltpgtthe 66fit advanced stability disc 35cm is ideal for intermediate to professional users it features two textured sides one virtually smooth for standing and the other with small dimples which are comfortable yet effective for sittingltpgtr ltpgtuse the professional balance disc as a training aid to improve balance and coordination whilst standing the dis