These are 5mm thick pads made using PORON shock-absorbing material for knee pads. This is a set of two pads. They are made with a diameter of 10 cm, but custom orders are also accepted. They are made for the purpose of increasing the shock absorption of futsal goalkeeper knee pads, but of course, they can also be used for pads in other sports or for other purposes. "Water-resistant fabric double-sided tape" is attached to the back, so they can be washed. The tape has strong adhesion, so it won't come off easily, but there is a possibility that it may come off after long-term use. In that case, please repair it with the aforementioned "Water-resistant fabric double-sided tape" (KAWAGUCHI Co., Ltd.). These are handmade items cut out from PORON sheets with scissors, so there may be some waviness on the cross-section. Please understand this in advance. The knee pads in the first photo are not included in the product. Basically, we cannot lower the price, but if you wish to purchase in bulk, we can offer a small discount. Thank you for your consideration. [How to attach to the pad] 1. Turn the pad over and place this 5mm thick PORON pad in the center of the pad. 2. Place a weight on top for several hours and press firmly. 3. Turn the pad back over and it's done.