Size M corresponds to a shoe size of US Men's 7-9. 

The Storm is a great all-around fin ideal for travel. Produced using Monprene, a single material construction gives both durability and strength while maintaining exceptionally light weight, exactly what the traveling diver requires. The innovative foot pocket design has the advantage of a full foot fin for comfort with the versatility of an open-heel fin foradjustments. Available for juniors and adults. Made in Italy.