I have a nylon running jacket that has a fleece lining. But the fleece is a series of dots rather than a smooth, solid lining. The tactile feel of clothes is important to me and these dots make this jacket more interesting. Functionally, they make the jacket lighter weight but still provide some warmth. The fun part though, is when you run your hand along the outside, expecting to feel smooth nylon, you feel the bumps of all the dots of fleece.