Speedo Men's Fastskin II
The Speedo Fastskin II competitive swimwear line is a technical swimsuit designed to let you swim faster. Fastskin II, also known as FSII takes advantage of a high tech fabric surface that mics the rough shark denticles to reduce drag along key areas of the swimmer's body.
The smooth surface material in the Fastskin II allows greater flexibility as well as less less drag, positioning the Fastskin II line of competitive swimwear as one of the most advanced racing suits in the world.