Using these sneakers is easy. Just open the stretch criss - cross closure, slip your feet in, and you're ready to go. When it comes to sizing, the two removable insoles allow you to adjust the fit according to your needs. If you have prescribed orthotics, you can put them in the shoes. As for maintenance, keep them clean by gently wiping with a damp cloth. Avoid machine - washing as it may damage the materials. Also, store them in a cool, dry place to keep the shape and quality of the shoes. If you notice any signs of wear on the outsole or insoles, consider replacing them to maintain the shoes' performance and comfort.