With collecting sneakers over the years, we have found two easy ways to keep your sneakers fresh. Other than using spray detergents or spray protectors. One of the products will remove the fuzz inside the shoe. Which happens over time with every shoe after usage when socks are worn. Secondly, is keeping your shoe air free over time some shoes will turn yellow. This bag extends/prevents that from happening by keeping the air out. The 13x18 zip lock bag fits from size: 4-15.