Featherweight fabric provides heavy-duty warmth with a revolutionary hybrid of natural and synthetic fibers. Fabric & Care 69% polyester / 31% wool plated knit. Machine wash cold with like colors, tumble dry low. Additional Features Warm merino wool is blended with polyester yarns to provide exceptional warmth. Greater wicking and drying power than 100% wool. Featherweight Power Dry fabric, zoned for added breathability when you're on the move. Naturally resist odors. Full-length pants have a solid elastic waistband for a secure fit. Imported.