Our sandstone sierra jacket is sherpa-lined for added warmth, it’s made of 12-ounce, 100% cotton sandstone duck and features princess back seams for a premium fit, built-in bi-swing for ease of movement, interior rib-knit storm cuffs, two inside pockets, attached, three-piece sherpa-lined hood and dropped tail for added coverage, main seams are triple-stitched for durability,