Swimming caps are designed for competitive swimmers in order to reduce hydrodynamic drag while swimming. By creating a smooth surface area for the water to flow over, caps allow swimmers to move more quickly and fluidly through the water than they could without a cap. This, in turn, improves mobility while swimming – helping you to perform better in competitionSwimming caps are designed for competitive swimmers in order to reduce hydrodynamic drag while swimming. By creating a smooth surface area for the water to flow over, caps allow swimmers to move more quickly and fluidly through the water than they could without a cap. This, in turn, improves mobility while swimming – helping you to perform better in competition