Ultimate comfort; The Cassie Sandal boasts a two part upper with buckle fastening for an adjustable fit in addition to a hidden elastic strap for extra give and comfort- perfect for those summer walks Real Leather Upper Two Part Upper with Buckle Fastening Inside Hidden Elastic to Vamp Strap for Extra Give and Comfort Super Soft Cushion Comfort Insole Leather Sock and Lining Hardwearing and Comfortable TPR Sole Heel height approximately 25mm