ODOR VENTILATORS: This branded product works from having super activated charcoal, baking soda, zinc oxide and two powerful odor blockers destroy odor CONTROLS WETNESS: Draws in perspiration so feet stay drier and feel more comfortable DURABLE: Heavy duty construction for longer wear and outstanding cushioning ALL-DAY EFFECTIVENESS ONE SIZE: Trim to fit Odor-Eaters Ultra-Durable Insoles with Heavy Duty Cushioning destroy foot odor with super-activated charcoal, baking soda, zinc oxide and two powerful odor-blockers. The insoles draw in perspiration so feet stay drier and feel more comfortable. Ultra-Durable's heavy duty, extra sturdy construction is designed for longer wear and outstanding cushioning for hard-working feet. This product is one size, trim-to-fit.