The Sierra Jacket comes in a 12-ounce 100% cotton sandstane duck. Our warm Sherpa lining runs through the body and hood of the jacket. The sleeves are lined in quilted nylon. Rib-knit storm cuffs also keep the cold at bay. The coat has two convenient interior pockets, two hand pockets, and features a handy left chest pocket that zips shut. Main seams are all triple-stitched for extra strength. And a bi-swing back design and pleated elbows add to your comfort and easier on-the-job movement.