Silicare Silicone Insole Blue Has Soft Blue Pads At The Heel And Metatarsal Areas For Additional Cushioning Effect. This Product Is For Normal Walking Only And Should Not Be Used During Jogging, Running And Sporting Activities. Silicare Silicone Insole Plain Does Not Have The Soft Blue Segments. This Product Is Recommended For Use During Jogging, Running And Sporting Activities.