Targeted for both training and racing, the RC5 Classic is built on a classic sole flex for easy striding. This boot features an external injected heel cap for enhanced stability and power transfer, as well as Speed Lock lacing and a Thermo Fit heel pocket for a secure, comfortable fit. The breathable Triple-F Membrane repels the elements while letting moisture escape, keeping feet dry. The Triple-F Membrane keeps water and snow from entering boots, while allowing excess heat and moisture vapor to escape. The climate inside the boot stays warm and dry, no matter what the outside climate is.