This is a therapeutic sandal that you only wear for 5-15 mins at a time. The first few uses may be very PAINFUL. We recommend adding thick socks before getting used to them. If your pain tolerance is very low, this may not be the right product for you! What is the benefit of BYRIVER reflexology sandals? Relieve aches and pains such as headaches, migraine, neck pain, backache, and neuropathy. Improve blood circulation and energy, and reduce insomnia, stress, and anxiety. Helps with plantar fasciitis, flat feet, arthritis, and muscle stiffness.