2.5-layer BRIX Performance shell fabrics are completely waterproof, windproof, breathable and highly packable. They are very lightweight and compressible, making them excellent choices for backpacking climbing, cycling and skiing and snowboarding. They combine a water-repellent shell fabric with a waterproof/breathable membrane and protective top coat barrier without the need for a protective lining fabric, which makes it light weight and highly packable. For those of you who have made this far, well done. Bottom line - it's a versatile piece of kit that is a must for any active adventurer.