Vionic with Orthaheel Technology Womens Atlas Sporty Sandal Synthetic Built-in Biomechanical Orthotic Arch Support - Orthaheel technology properly aligns your feet with you lower limbs - impoves balance- posture and foot comfort. Dual-density midsole provides support and comfort. Perfect for all day comfort or for wearing after an active day. Durable outsole. Medium Width Toe Post Sandal