Vionic Julieta Women39s Ballet Flats. Vionic flats builtin orthotic is shown to be effective in helping to treat heel pain plantar fasciitis. These fashion shoes will be your new casual basic ballet flat favorites For the greatest comfort we recommend wearing your new Vionic footwear for just a few hours for the first few days to allow your feet to adjust to the new level of orthotic comfort and support. Within one to two weeks you should find the product completely comfortable and supportive. Thereus a science to our style Vionic shoes provide essential stability and addictive support. With contours seamlessly engineered into each and every pairufrom flip flops to heelsuVionic helps support natural alignment from the ground up in looks youure going to love.from the ground up in looks youure going to love.