OCCLS610 / LS610 LINER WINTER LONG NECK SHERPA Cotton Twill Liner with Sherpa Lining For heavy-duty warmth, navy 100% cotton twill shell and white Sherpa lining offer two layers and a long neck to keep the cold out. Outer shell and binding are flame retardant until washed. Sherpa liner also features warming pack pockets lined with DuPont Thermotex microporous material, elastic gap eliminators, and a reflective strip on the back.