1.Material: The heel cups are made with high quality medicalgrade soft silicone which can prolong the wear resistance. If necessary, gently clean the heel cushion inserts manually with mild detergent.2.Firm adhesion: The SelfAdhesive Technology provides strong adhesion and keeps the heel pad securely in place on the shoe. In addition, the insoles can be reused as often as you like just wash them in warm water and let them dry naturally.3.Pain relief: Protect your heel pain and relieve your ankle muscle fatigue. Helps target your heel to promote relief, help with plantar fasciitis and reduce heel pain when running, walking and standing.4.Super cushioning: The heel is gently cushioned on every impact, providing even pressure distribution throughout the foot this ensures walking comfort and reduced pain and fatigue.