ultra comfort insoles are specifically designed for everyday shoes. when you wear shoes day after day, odour & wetness can build up. the thin, flat design of ultra comfort insoles cushions without crowding in the shoe, & a powerful combination of technologies provides superior odour & wetness control that lasts for months., extra comfort for everyday shoes, destroys odour on contact & absorbs sweat, specifically designed for men's & women's everyday shoes, one size fits all, long lasting protection 4 months guaranteed