Looking for the Coleman sleeping bag they manufactured approximately 20 years ago. The outer shell is the same type of fabric that is used for the Carhart and Schmidt coats. They even use it for long sleeve shirts and pants. It feels like roughness of canvas. The inside is a cotton design fabric. I know the inside wears out. I had a seamstress make a flat sheet with Velcro pieces sewn on both the sleeping bag and sheet. I was an Over The Road truckdriver years ago.