We made the California Home Goods' Air Purifying Bags to help you live a naturally clean, fresh and dry home. Our most popular 4-Pack Complete Home Set comes with everything you need to freshen up your life:2 x Medium Bags (200g): Perfect for medium sized enclosed rooms such as closets, cars, refrigerators and freezers. 1 x Small Bags (75g): Fantastic for small areas that need more work. These pack a punch for their size! 2 x Extra Small Bags (50g): Fantastic for small areas and crevices like litterboxes, gym bags, and shoes.. Reusable for Up to 2 Years: Simply lay in the sun for 2 hours every month to rejuvenate.