These furry suckers are great. They are 100% polyester and fiber pile. That means the outside of the bib is tough and durable the inside is pile fabric, which is furry. It is an even thicker fleece. The bib pants have plastic zippers at the sides, for easy maneuvering when disrobing. It has elastic straps that snap shut to the plastic clasp. The straps will adjust to any size. It also has a zipper at the back!! Perfect under your chest-waders fly-fishing.