The Copper Fit Arch Relief Plus is designed to provide support and relief to people suffering from fallen arches, flat feet, heel, toe, ball of foot or bunion pain, plantar fasciitis, arthritis and heel spurs. Our high-performance Arch Relief Plus is an adjustable compression band with built-in adaptive arch support. You can customize the level of compression band, wear it under or over socks, and with or without shoes to help relieve sore aching feet. One size fits most adults. Copper Fit Arch Relief Plus should provide compression but should not be worn so tight that it restricts circulation. Tight fitting garments can cause heat rash or other skin conditions, especially when hot and sweaty. If pain persists or a rash develops, discontinue use and consult a physician. Neoprene - This product contains a synthetic rubber known as neoprene (polychloroprene) between layers of fabric. Neoprene has the potential to cause irritation or allergic-type skin reactions in some individuals with sensitive skin or allergies. If you have previously had such a reaction to neoprene, you should not wear this product. If you experience a skin rash or other irritation when wearing this product, immediately discontinue use and consult a medical practitioner.