This soft, stretchy bio-gel, similar to human tissue, is washable and can be kept clean. You insert your middle finger through the hole and position the pad on the front part of your sole to alleviate pressure and impact while walking. I am selling one unused item, as I only use one of the two. There is no distinction between left and right. Although it may vary from person to person, the pain is completely different with and without it. Purchased on Amazon for 2,100 yen. I will repackage and ship it without the plastic case. #FootCare #SolePad #Corns #Calluses #FootSupport