ulliFabric 4-Way Stretch Woven Polyester Shell Nylon Ripstop Seat & Knees.liul ulliA durable Water Repellent finish resists light precipitation and prevents the face fabric from wetting out.liul ulliReinforced Seat and Knees The seat and knees are reinforced with a waterproof nylon ripstop fabric so a long slog on a wet saddle or a quick seat in the snow won’t leave you cold and wet.liul ulliRemovable Knee Pads Removable knee pads offer additional protection whether you’re scrambling. through talus in the Northern Rockies picking your way through cactus in the Sonoran Desert or field dressing an animal.liul