The CALF ASSIST is well-designed by focusing the work of the gastrocnemius muscles (calves), which is the main calf muscle. The structure is designed under the life taping theory. By adopting the X-shaped taping structure, it supports the work of the gastrocnemius muscle, and the activity of the leg becomes smooth. In addition to becoming easy to walk, the CALF ASSIST makes the calf less tired by suppressing blurring of the gastrocnemius muscle. The upper and lower anchor structure stabilizes the taping function by tightening moderately to prevent the supporter from slipping upward and downward.