This item was a hot topic on Nishiyama-san's blog and Twitter at Tennis Shop Raffino Funabashi. I believe it's a product that provides an amazing sense of stability simply by placing it on top of your existing insole, aligning the heel. This is a new insole that has saved athletes as a solution for foot-related sports problems. I am selling this size because a size up fits me perfectly. It fits feet that are 2E and approximately 25-27cm. This is Life OTC® made by Northwest Podiatric Laboratory, purchased from the distributor, Impact Trading. This high-performance insole correctly supports the foot's skeletal structure and stabilizes walking. It is recommended for mountaineering, as well as walking, running, and strenuous sports, and for those who stand for long periods. I think it is especially suitable for those who have knee or back injuries from playing tennis. It restores the foot's movement to its correct state. I believe it is undoubtedly a top-of-the-line insole. ■Size 8/9 (25.0cm - 27cm) ■Condition Used 2-3 times for tennis, so there is a feeling of use. There are some scuffs on the back where double-sided tape was used to prevent slippage, but there are no functional problems. Please consider only if you understand that this is a used item. This insole supports you in a way that prevents injuries. - Brand: Northwest Podiatric Laboratory - Model: Life OTC, Retail Price: ¥22,000 - Size: L, R (Left, Right) - Accessories: Box, Instruction Manual - Condition: Used 3 times Thank you for viewing.