Washable and Reusable Design This air filter is easy to clean by rinsing with soap and water, making it an economical and reusable design.Cut-to-Size Design Cut this air filter to size using a standard pair of scissors to provide a custom fit for any window AC unit design.This air filter is made from open-cell, polyurethane foam. It helps keep dust and pollen out of your home. With plain scissors, you can easily cut it to any size to fit your AC window unit. This easy-to-install filter is washable and reusable for lasting use. 3 pack.