Yes, it is lined, but only with a mesh liner, this is why it is lightweight. These types of raincoats are not meant for cold temperatures. The good thing about it though is that you can wear it as a windbreaker as well or for moderate rains. If the temperature is too cold, you can layer your clothes because it has a loose fit. You should also be careful about washing it because the mesh can easily snag because it is made of very light materials.