Bauerfeind ViscoHeel Heel Cushions are made of soft high quality viscoelastic silicone and reduce shock loads to the ankles, knees, hips, and back. This relief reduces pain that is primarily caused above, not below, the heel, such as when the Achilles tendon is inflamed, a "pump bump," known as Haglund's deformity, or in knee or hip osteoarthritis. Protects joints, spine, tendons and ligaments, with every step. Anatomical design supports the hindfoot and smoothly tapers toward the midfoot and facilitates a natural heel-to-toe movement. Slightly wedge-shaped heel cushions are anatomically contoured and are therefore, Right and Left specific. Flush fit in your shoe, allowing the shoe, heel cushion and foot, to form one stable unit. Low profile heel rim so they won't slide in your shoe. Indications: Arthritis or Osteoarthritis of the leg joints, hips, or knees (shock absorbing effect), Knee prosthesis relief, Achilles tendinitis, Achillodynia, - tendomyopathy, Haglund's deformity - partial relief (pump bump), Tarsal bone pain, Leg length difference up to 1/3 inch (1 cm) by wearing one cushion, Calcaneal (heel) pain. Made in Germany with the highest quality standards. Does not absorb odors. Clean with soap and warm water. Latex free. Sold in pairs. Size determined by Shoe Size: Size 0 = Child, Size 1 = Men's 2.5 - 4, Women's 3.5 - 5, Size 2 = Men's 4.5 - 7, Women's 5.5 - 8, Size 3 = Men's 7.5 - 10, Women's 8.5 - 11, Size 4 = Men's 10.5 - 12, Women's 11.5 - 13