Combining science and speed for the Elite swimmer. Working smart is an important as working hard. Constructed from optimum materials and based on the science behind swimming, Speedo Aqualab have worked with world-class Team Speedo athletes to create a range of ergonomically designed Fastskin training aids. The Fastskin Pullbuoy isolates your upper body forcing your arms to do the hard work, leaving you free to focus on your arm technique and improve upper body strength.