The heavyweight lining expands the temperature range. Lightweight but still warm enough. Size runs a little big with a small being an excellent fit for a 5-8" 155 pound man.
I was unfamiliar with the brand name of this item when I purchased it. Once I received this sweatshirt, I was very impressed with the excellent workmanship. It does indeed keep you warm. My son liked it so much, I gave it to him...I will be buying another one. Although a little pricey at its regular price, it's still well worth the money if your looking for quality.
Gave the sweatshirt as a gift to my husband. Really like the quality. Very pleased with the purchase. Is true to size and is comfortable and warm to wear but is not bulky.