Speedo BioFUSE® is engineered to perform with your body, offering superior comfort through fit. The human body combines the structural strength of the skeleton and the flexibility of muscles. The result is performance greater that its individual parts. This is the inspiration behind ® technology, where products are engineered to perform in harmony with the body. The interaction of structure and flexibility result in enhanced performance, comfort and fit.
All sizes are in US sizes.
US size is 1-1.5 sizes bigger than UK size for men and kids.
US sizes are 2-2.5 sizes bigger than uk sizing for womens
Please take note of any sizing descriptions on individual shoes styles as some shoes fit either very big or small