Model KW-319C Color Black Material Silicone Quantity 2 Functions Antibacterial deodorant breathable reduce pressure eliminate fatigue Size Medium (40~42) Features Effective mitigation of impact and fatigue will help make your campaign walking more comfortable; Scientific three-dimensional design antibacterial deodorizing ventilation; Stimulate important reflex zones to relieve pressure on the knees and protect the knees; Made of best silica gel insoles material soft and comfortable and flexible with strong wear resistance; Integrated foot massage decompression shock and far-infrared therapy in a new type of health care insole Packing List 1 x Pair of insole pad 1 x English user manual