Using these insoles is easy. Just take out the old insoles from your hiking shoes and place these new Thermal Trail Insoles inside. Make sure they fit well. When it comes to care, you can gently hand - wash them with mild soap and water. Let them air - dry completely before putting them back in your shoes. Also, don't expose them to direct sunlight for too long as it might affect the insulation. These insoles are designed for hiking, so avoid using them for other extreme activities that could damage them.