Tendol Mermaid Swimming Fin, with new strong adjustable strap. NEW DESIGN AND HIGH QUALITY. Tendol had updated the fin with new high quality adjustable straps, our new straps were tested for its quality and durability. COMFORTABLE AND SAFE. Comes with TPR foot pockets to prevent irritation. VARIATION OF COLORS. Available in many colors, purple, Pink, Blue, Green. SIZE. this fin has an adjustable strap in back of the feet to make it size variable, it fits shoe sizes 1-6 male, or 2-7 female. Please Note. This mono-fin should be used only with an adult's supervision.