Molding the footbeds either way will result in a footbed that matches the shape of your unique foot. The arch and heel cup will adjust to fit you, without flattening out, increasing support and the function of the footbed. WEAR MOLD: Place the footbeds into your footwear and wear as with any other shoe. The footbed will wear mold to your unique foot after a few days. HEAT MOLD: The other option is to heat mold the footbeds in an oven before wearing them. Heat molding will mold the footbeds to your foot instantly, and is recommended for people with very low arches. FEATURES » Polygiene® antimicrobial treatment used to inhibit the growth of odor-causing microbes» Perforated Non-Structural Areas To Reduce Weight» Ventilated Softec Cushioning For Increased Airflow» Moldable Base Layer, 20% Recycled Content» Moisture-Wicking Top Sheet, 35% Recycled Content» Adjustable Arch Support» Deep Heel Cup» Heat Moldable» APMA Accepted IS THIS PRODUCT RIGHT FOR ME? Recommended Footwear:» Running Shoes» Trail Running Shoes» Cross Trainers Recommended Activities:» Running