These are DSIS Sorbo Trekking Air insoles. They fit sizes 25.0-26.0. They use the shock-absorbing material "Sorbo" to reduce stress on the heels and arches. Designed for trekking wear with excellent breathability, they help to prevent sweat and stuffiness. Manufactured and sold by Sanshin Kousan. This is a used item. While there is some wear and tear, there is no noticeable damage, and it is still in good condition. Please consider purchasing if you understand that this is a used item. ^_^