Active, slip-on sneaks that feature comfy knit, cool graphics, and 1st Ray technology for increased flexibility under the big toe. Uppers: Textile. Footbed Lining: Removable Mesh-Covered EVA. Outsole: Durable Rubber. Heel Height: 1.75". Platform Height: .75". Vionic active footwear features Advanced Motion System (AMS) technology, combining our podiatrist-designed orthotic with a flexible, cushioned outsole and a lightweight, breathable upper. Step into support for work, play and everyday. 1st Ray Technology promotes better forefoot mobility and gait efficiency.