We run both panniers and manty loads and value them both. The panniers we have were custom built and out of a water resistant, kind of a vinyl coated canvas for a lack of a better description. They're simple and durable, but no where to be found in my search. That said, if I were to buy panniers today, I would buy from Mountain Ridge Gear or from Custom Pack Rigging Ltd. I believe these two companies are offering the finest engineered, designed and built rigging based on my relatively limited, but purposeful experience.