These shoes are ready to wear right out of the box. Ensure you select the correct size for optimal comfort and performance; it's often recommended to try on running shoes at the end of the day when feet are slightly swollen. They are compatible with most standard running socks and are best suited for road running environments. To care for your New Balance 520v9 shoes and ensure their longevity, always refer to the specific product label for detailed cleaning and maintenance instructions. Generally, spot cleaning with a mild soap and cold water solution is recommended for the engineered mesh upper, and air drying away from direct heat will help maintain their shape and material integrity.