Men's mountain bike clothing is usually loose-fitting. As with road bike clothing for men, the materials used are mostly moisture-wicking synthetics, but aerodynamics are not as important for most mountain bikers. Unlike road bike shoes, mountain bike shoes have large molded lugs on the soles to provide traction when the rider is off the bike.
Road bike clothing is usually worn very close to the skin. This aids in moisture-wicking as well as aerodynamics. Some bike clothes even have a dimpled texture like a golf ball that makes the cyclist more aerodynamic. Men's road bike shoes are often designed with as little stitching as possible to aid in aerodynamics and reduce potential weak spots.