- Synthetic
- Imported
- Synthetic sole
- Textile & Man-Made Upper
- Removable Mesh Covered EVA Footbed
- Durable Rubber Outsole
- APMA Seal of Acceptance
- Vionic offers innovative biomechanical technology concealed in every style, so you can enjoy all life’s occasions with confidence and comfort – all day, every day.
With a winning blend of technical features, the Flex Sierra showcases an engineered knit upper for added breathability and a dual-density outsole, as well as 1st Ray technology for added range of motion under the first metatarsal. Rubber elements andd traction under foot.
