Cedar wood dryer bags are natural shoe dryers filled with cedar wood. Cedar wood is known for its moisture-repelling properties. The shoe dryers dry your shoes four times faster than air drying. After each use, simply place the two bags in your running, hiking, skiing, or everyday shoes and let the cedar wood do its job. For optimal use, please allow the shoe dryers to work overnight. Additionally, the scent of cedar wood leaves a pleasant fragrance in your sports shoes.