Vionic with Orthaheel Tide Sequins This again is a high quality flip flop sandal and it has been designed by a podiatrist. It comes with a unique upper that is made from high quality sequin with a soft lining. It also features a very special footbed that is biomechanical orthotic in nature. It also has an arch support with a deep heel cup and a dotted design. It has a very special dotted design which goes a long way in better stability and grip.