Features: Nylon-spandex material has no static electricity, moisture perspiration fabric provides all-day comfort. SEBS material is non-toxic, has good stability, heat resistance, high elasticity, and is not easily deformed. Dot massage design continues to massage the foot to relieve pressure, it is also fit the arch of the foot, good for shock absorption and decompression. Stretchable sleeves has high elasticity, which are suitable for different sizes of feet. Provides extra foot support to your heel, arch and ankle, promoting blood circulation, which speeds up your recovery and therapy Specification: Item Type: Foot Arch Support Insole Material: Nylon Spandex, SEBS Color: Black Quantity: 1 Pair Size: Free Size Size: Approx. 11.8 x 7.8 x 1cm / 4.6 x 3.1 x 0.4inch Weight: Approx. 53g / 1.9oz Package List: 1 x Pair of Foot Arch Support Insole Package List 1Nylon-spandex material has no static electricity, moisture perspiration fabric provides all-day comfort. 2SEBS material is non-toxic, has good stability, heat resistance, high elasticity, and is not easily deformed. 3Dot massage design continues to massage the foot to relieve pressure, it is also fit the arch of the foot, good for shock absorption and decompression. 4Stretchable sleeves has high elasticity, which are suitable for different sizes of feet. 5Provides extra foot support to your heel, arch and ankle, promoting blood circulation, which speeds up your recovery and therapy