Odor-Eaters Ultra Comfort Insoles. Ultra Comfort insoles are specially designed for everyday shoes. When you wear shoes day after day, odour and wetness can build up. The thin, flat design of ultra comfort insoles cushion without crowding in the shoe, and a powerful combination of technologies provide superior odour and wetness control that lasts for months. Activated Charcoal - Locks in and destroys odour for months. Insta Fresh - Technology instantly neutralises sweat acids that release odour. Powerful Anti-Bacterial Agent - Fights odour-causing bacteria. Absorb perspiration - To keep feet dry and comfortable. Special Comfort-Grip Foam - Won't slip, slide or bunch up.