Rain jackets and hard shells, commonly called waterproof jackets, are designed to resist harsh weather such as snow and heavy rain. Their membrane consists of several plies, made of 2 to 3 layers. Some shells also wick moisture away and feature sealed seams... for added protection to help you stay dry during a backpacking trip. And among those jackets, some also comes with a DWR treatment improving their ability to repel water.Show more