Very lightweight material. I live an hour from the Canadian border in North Dakota - this is definitely a little light as a solo head covering for the coldest parts of winter (we get temperatures around -20 to -40 Fahrenheit here) - but it's very versatile. It has great breathability so you don't get an ice block over your nose and mouth, and you can pair it with heavier accessories. It's really great for when you're going to be active outside in winter - whether that's for xc skiing, snowshoeing, or if you do work in the oil patch. Very pleased with this purchase.