Vionic Kaia Women's Stacked Heel Sandal. Conquer your day with Kaia, a sophisticated stacked open heel in soft suede with a flirtatious peep at the toe. Full-contact support hugs your foot's curves. Vionic's Elevated Support technology gives you comfort and style in their wedges and heels. Heel seat stabilizes and positions foot. Stylish and comfortable footwear that incorporates a podiatrist designed biomechanical orthotic.