SAS® Cool Step Comfort Footbed Relacement Insole: These footbeds come in 4 sizes (S) recommended for slim width shoes, (N - M) fits a narrow or medium width shoe, (W - WW) fits a wide or double wide width shoe, & (WWW) recommended for 3W width shoes. NOTE: This is the original SAS replacement insole that is recommended for the following SAS men's styles: Time Out, VTO, Guardian, Bout Time, Side Gore, Journey, Journey Mesh, Journey II, J-V Mesh, and Navigator. Our SAS Cool Step Footbed uses a germ-fighting foam material that aids in wicking moisture from the foot's surface. Cool Step O2 foam is engineered to be firmer and more supportive under the heel for stability and softer under the forepart of your foot for cushioning. The O2 Airflow cover on this helps in reducing friction that can cause heat buildup underfoot. The heel is cupped for a cradle-fit. Our SAS Cool Step Footbed gives the wearer a much 'cooler', more stable, comfortable walking experience.NOTE: Recommended for SAS men's styles : Time Out, VTO, Guardian, Bout Time, Side Gore, Journey, Journey Mesh, J-V Mesh and Navigator.Foam material. Machine washable. Made in the USA. SKU 10040000