Planning rides in the spring and the fall can get tricky?take some of the guesswork out of getting dressed for a ride with the Gore Bike Wear Men?s Fusion SO Pant. Specifically designed for mountain bikers looking for protection in changing weather conditions, the Fusion SO is a bike zip-off pant that relies on the WindStopper Soft Shell fabric for lightweight, highly breathable, water- and wind- resistant protection from the elements, and a zip-off pant leg for maximum versatility.