Columbia Women's Saturday Trail II Knee Pant. The Columbia Saturday Trail II Knee Pant was made for the outdoor-loving woman—it's the ultimate outdoor staple. Crafted of a soft nylon and elastane fabric, these knee pants remain lightweight, yet durable, no matter the weather or activity. High quality materials and expert craftsmanship are the backbone of Columbia’s women apparel. The technology featured in these knee pants are necessary for the outdoors. The exterior layer is made up of Columbia’s signature protection fabrics: a combination of water and stain repellency and UPF 50 to help block and shield from UVA and UVB sun rays. The Columbia Saturday Trail Pant is also durable and comfortable - the gusset detail, comfort stretch, and articulated knees provide you with a personalized fit.