This is a great Kickstarter that's just been funded: the No Sweat Pant. These pants are made with a revolutionary blend of materials and unique layout that allows for maximum flexibility, as well as fabric that won't make you sweat. They're also naturally anti-bacterial and odor resistant.
The pants use four different types of fabric to ensure breathability and flexibility: Tencel, polyester, cotton and spandex. The best part about these pants is that they look normal. They actually look like a pair of pants that you could wear to the office if you needed to.
For a sweaty guy like myself, I'm hoping this product is everything it claims to be.