Vionic Dahlia Women's Ballet Skimmer Flat - Free Shipping. An amazing knit upper that molds around your foot and a comfy asymetrical topline will make this your go-to flat for all-day wear. 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.