BambooMN Acivated Bamboo Charcoal Odor Absorber Moisture Eliminating Shoe Inserts, 100g per pair - Black 10prs 10 Pair of Granulated Bamboo Charcoal Odor Absorbing Shoe Fresheners. Trap and destroy foot odor. Slip one of these packets of bamboo charcoal into your shoes every time you take them off to help control foot odor. Not only do these charcoal inserts absorb odors, they help prolong the life of your shoes by quickly absorbing excess moisture between wearings. Re-usable, to recharge the odor absorbing and destroying power of the bamboo charcoal, simply lay the air freshener out in bright sunlight. These air fresheners each measure approximately 3.5" X 6" X .75" and contain 100 grams of Bamboo Charcoal per pair.