The Cyclone Eco Full Zip Pant has been discontinued. It last appeared in Sierra Designs's 2010 product line. If you're looking for something new, check out the best waterproof pants for 2019.
Altrec Outdoors says:
Made with technical yet green fabrics, the Sierra Design Cyclone Eco Full Zip Pant is a hardshell 2.5 layer, waterproof/ breathable pant+. Made with PVC-free seam taping, Aquaguard zippers, and articulated knees, the Eco Pants can be your backpacking pants, lightweight ski jacket or everyday wear-to-work when it's storming pant.
Historic Range: $125.09