The Vionic Lonny Sandal embodies flawless warm-weather style, featuring a jute-wrapped espadrille midsole, 2 wide straps in the upper, and a buckled slinkback strap. Features Jute-wrapped espadrille midsole Wide double straps in upper Buckled slingback strap 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 complete Scientifically Proven to Alleviate Heel Pain. Orthaheel Technology. *Based on a peer-reviewed clinical study partially funded by Vionic on people experiencing moderate, non-traumatic heel pain. Vionic contoured sandals were shown to be comparable in effectiveness to Vionic orthotic inserts.