Fleece mid-layers are a type of clothing designed to be worn between the base layer and the outer layer. They are typically made from fleece, a soft and warm synthetic fabric that is also lightweight and breathable. Fleece mid-layers come in a range of styles, including jackets, vests, and pullovers, and can be worn as a standalone layer in milder weather or as a mid-layer for additional warmth in colder weather. Fleece mid-layers can also be designed with additional features, such as pockets, adjustable cuffs, and zippers, to provide extra comfort and convenience.