Simply put, the Sierra Designs Isotope is the lightest woven fabric waterproof/breathable jacket currently available, and the pants are not far behind. Actually the Isotope is lighter than most non-woven fabric rainwear. More amazing yet is that it's full-featured, not Spartan as you might expect.
By Backpacking Light
Backpacking Light was founded in November of 2000 with the simple mission of promoting backcountry travel in lightweight style. We are based in the Northern Rockies with offices in Bozeman, Montana and Laramie, Wyoming, with educational and guided trekking programs offered in the Absaroka-Beartooth Wilderness of Montana (Billings area) and Medicine Bow Mountains of Wyoming (Denver area).