INVISTA's THERMOLITE® fabric and insulation provides warmth and comfort without weight. Because it is comfortable and lightweight, THERMOLITE® fabric and insulation allows freedom of movement—making it the perfect layer. Its hollow-core fibers trap in air for greater insulation for light, yet heavy-duty performance. In a coat made with THERMOLITE® fabric and insulation, you will stay warm and dry. Its larger surface area allows for fast evaporation by sending moisture away from the skin to the surface of the fabric, where it quickly evaporates. THERMOLITE® PRO insulation THERMOLITE® PRO insulation is able to deliver state-of-the-art insulation battings with an improved balance of performance properties and consumer benefits, compared to current market leading offerings. The performance fibers (T799) are engineered with a differentiated fiber shape, able to produce battings with sought-after lightweight warmth. The unique shape of the T799 fibers make them approximately 22% lighter than round fibers of comparable diameter*. *Void percentage is approximate. Tests can be ran when solicited.