This is the Tsunoda-style Ankle Theory Supporter EX, developed by Dr. Norio Tsunoda, the "God Hand" popular on YouTube and TikTok. With its patented structure, wearing it on both feet reduces the burden on the ankles, knees, hip joints, and lower back with just this one supporter. You can go out wearing shoes while still wearing it. This popular product often sells out. Unopened, brand new. - Size: L (25.0〜27.5cm) - Model Name: Ankle Theory Supporter EX - Purpose: Ankle supporter (set of 2, left and right) - Gender: Unisex - Color: Black - Made in Japan