2-toned. Longer blade to emphasize each kick. Each size has its own distinct blade color. Flexible foot pocket. Closed ankle provides extra support. Fins float to the surface. Easy on and off. Sizing is based on men's shoe sizes. Size: Toddler, M = Boys & Men, W = Girls & Women NOTE: If your shoe size is offered in two size brackets, please choose the larger size range. If your fin is fitting too big or chafing, we recommend that you purchase fin socks. Warning: Not intended for walking on dry land and/or excess bending. Fins may break if misused. For more information on swim fins, read How to Choose Swim Fins. PLEASE NOTE: Product is not latex free. If you have a latex allergy, we recommend buying fins made of silicone. Materials: 100% Rubber Fit: Based on feedback, it is recommended to size up for Youth sizes (Toddler 4-6) and (Toddler 6-8), as they run extra small compared to all other sizes. Adjustable: No Country of Origin: Imported