What exactly is 3L (3L jackets) ?

3L stands for 3 layers, which signifies products that are purely shells. These products have a streamlined construction, they are lightweight and very breathable. The construction includes a waterproof membrane which restricts moisture from the outside. 3L products are fully seam taped, on critical seams as well as on any other seam, which is the main difference to most 2-layer jackets. Additionally, 3-layer jackets are usually half a pound lighter than 2-layer jackets, which makes a huge difference in certain winter sports practices. Moreover, these products are meant to have a slightly larger cut due to their technology.