Brand from New Zealand: GRAN'S REMEDY. The yellow packaged GRAN'S REMEDY is the most popular unscented type by far.If you are in doubt about which of the three types to choose, you can't go wrong with the unscented type.The pure white powder penetrates into every nook and cranny of your shoes and eliminates the stench of your troubles.The problem in the morning is gone in the evening. Such a miracle is possible with GRAN'S REMEDY.How to use:Once a day, sprinkle this product (powder) evenly into your shoes with the included spoon.You can keep your shoes on.If you use it for about 5 to 7 days, the deodorizing, disinfecting, and antibacterial effects will last for a long time.