Bauerfeind ViscoPed are the original multi-density silicone insole for targeted relief of metatarsal pain (pain under the ball of the foot) tired aching feet sore knee joints and back pain. These full-length viscoelastic silicone insoles incorporate areas of softer density in the heel and under the ball of the foot in the metatarsal region. They have a raised metatarsal pad that aids in the desired realignment of the metatarsal heads. Ventilation holes allow for air circulation to prevent heat build-up. Comfortable and long lasting may be easily trimmed for optimum fit. Does not absorb odors and easy to clean with soap and warm water. Does not contain latex. Non-slip and can be worn in walking sports and work shoes sometimes it is recommended to remove the existing shoe insole. Sold as a pair to prevent leg length discrepancies and can be switched from one shoe to another. Made in Germany with the highest quality standards. For insoles without the raised metatarsal pad see Bauerfeind ViscoPed S. Can be used to treat: Metatarsalgia Mortons neuroma Foot pain (plantar pain) Pressure redistribution Splayfoot Fat pad atrophy Back and joint pain Hyperkeratosis Forefoot and toe deformities. Size is determined Shoe Size: Size 1 = Mens 5 - 6 Womens 6.5 - 7.5 Size 2 = Mens 6.5 - 7.5 Womens 8 - 9 Size 3 = Mens 8 - 9 Womens 9.5 - 10.5. Size 4 = Mens 9.5 - 10.5 Womens 11 - 12 Size 5 = Mens 11 - 12 Womens 12.5 - 13.5.