Prepare yourself for hot summer temperatures There is also the perfect functional shirt for trips on warmer days. Bontrager's lightest functional material B1 is a comfortable first layer of Profila Cool material with 37.5 technology to regulate relative humidity and maintain your body's ideal core temperature for better performance on the bike. Fits comfortably under all of your jerseys. Profila Cool, enhanced with 37.5 technology, regulates the body's relative humidity and helps maintain your ideal core body temperature so you can perform better.
Profila Cool material with 37.5 active particle technology
Long enough to be tucked into shorts/trousers
Extended back for a perfect fit on the bike
Close-fitting cut for aerodynamic fit and better performance