Here's what other sites are saying:
The versatile, very compressible EMS Thunderhead full-zip rain pants deliver dependable waterproof, breathable, wind-resistant protection in all weather conditions.. . . System Three provides waterproof protection and breathable comfort when moisture prevails. Two-way full side zips. Articulated knee for easy movement. Snap closure at bottom hem. Zippered back pocket. Relaxed fit.
- EMS refers to the men's version