Use in small contained areas like shoes, boots, gym bags, sports gear, laundry bags, trash bins or luggage. The Mini Air Purifying Bags absorb odor-causing sweat without the harmful effects of chemicals or fragrance. Overnight, powerful bamboo charcoal attracts particles like a magnet and continuously works to remove odor and moisture, leaving your shoes fresh and dry. Includes 2 per package. Suggested Uses- Place in the affected item. Once a month for one hour, place the Moso Bags outside to rejuvenate. Even on cold or overcast days, the UV rays from the sun will clear out all of the impurities that the bamboo charcoal has absorbed. At the end of two years, the bamboo charcoal can be recycled into your garden to help your plants grow.