Our Nano Flex 3G fabric is the result of a decade of development. It is our best versatile fabric for winter tights: warm, stretchy, luxuriously soft, super breathable, and as if that weren't enough, it features our water-repellent finishes made with third-generation nanotechnology. While other companies use simple chemical water-repellent treatments, we have created a mechanical water repellency through nanotechnology to enhance the chemical DWR finish. You'll stay warmer and more comfortable. Even though these tights feature our latest water-repellent technology, don't think they are just niche rain tights. The fabric also makes them great for dry days, and the reduced seams with anatomical cut ensure they are very comfortable. We used the professional KISS Air2 chamois, mesh straps, and ankle zippers. These tights are great in all weather conditions.