Odor-Eaters Ultra-Comfort Insoles destroy 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-Comfort Insoles provide a slim, comfortable fit that "cushions without crowding". This product is one size, trim-to-fit. Fits up to size 12 shoes and boots.