The Floriana toe-post sandal is intricately designed with earthy stones in geometric shapes, dainty riveting and gorgeously textured material. Scientifically Proven to Alleviate Heel Pain..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. Vionic Natural Alignment.