Using these insoles is easy. First, take out the existing liner from your roomy footwear. Then, place the Superfeet insoles in the shoes. You may need to trim the insoles to fit your shoe size. Just use a pair of scissors and cut along the marked lines. When it comes to maintenance, it's a good idea to take the insoles out of your shoes regularly to let them air dry. This helps prevent bad odors. Also, avoid machine washing or drying the insoles as this could damage them. If the insoles get dirty, you can gently wipe them with a damp cloth. Keep in mind that these insoles are designed for high-impact activities, so they're great for sports like running or jumping. But always make sure your shoes have enough room for the insoles to fit comfortably.