Half insoles made using PORON. This product solves the problem of: "I like my shoes and insoles, but I want to improve the shock absorption and cushioning." You can improve shock absorption and cushioning simply by placing it under your existing insoles. Because it's a half insole, you can improve cushioning without making your shoes feel tight, even in tight-fitting shoes. In rare cases, inserting this may make the shoes feel tight. If this happens, please cut off 2-3 cm from the arch side. To install: Peel off the double-sided tape on the back and attach the insole to the heel area of the insole-removed shoe, slightly overlapping the sides. (See photo 2) Then, put your existing insole on top, and you're done. The double-sided tape is a re-removable type, but please note that some adhesive residue may remain when removed. Although it is made in a free size, if you feel the half insole is too large, Overlap it with your existing insole, align the heel edges, mark the protruding parts with a pen, and cut them off. This is 3mm thick, and the size inside the shoes will hardly change, However, we can also produce a thinner 2mm type and a 5mm type for shoes with deeper heels. If you wish, please contact us in the comment section. This is a handmade product, not an industrial product, and is cut from PORON sheets by hand with scissors, so there may be some waviness on the cut surfaces and marks from the marker used for shaping. Please understand this beforehand. There is no problem with use. It can be used not only to improve the cushioning of sports shoes but also for sneakers. Basically, we cannot offer discounts, but we can offer a small discount for bulk purchases. Thank you. ※Because PORON tends to harden slightly at low temperatures, If the outside temperature is low, you may not feel the full effect. If you are concerned, please warm it with a heat pack before use.