Thank you for viewing. These are Speedo training fins for competitive swimming. If you're used to them, they can also be used for snorkeling! I've only used them a few times for pool practice, but I'm selling them because I don't use them anymore. - Brand: Speedo - Model Name: Biofuse Training Fin - Size: UK 8-9 / US 9-10 / EUR 42-43 / CM 26-27 Since these are used items, returns and exchanges are not accepted. Thank you for your understanding. #speedo #speedo #fins