This insole is recommended for the following people. ・ Heels flutter when walking I feel like my shoes are a little big. ・ There are strange wrinkles on the instep of the shoe. If you are concerned about the above, there is a gap between your foot and your shoe and the shoe does not fit your foot. To fill in the gaps, choose a front gel with the thickness of the following sizes. If you put your fingertips in the opening and one fingertip can easily fit in, use 2mm front gel as a guide. If you put your fingertips in the opening and two fingertips can easily enter, use front gel 3mm as a guide. If you use the rear gel of the pump Bikata series ❷, it will be difficult to slip forward, so we recommend using it together. Furthermore, even if you fill the gap between the foot and the shoe, it will not be effective if the lateral arch is collapsed, so we also recommend the Namida gel from the Mikata series of pumps.