I do a lot of spot and stalking up north where the winters can be brutal. I'll usually sit on the side of a hill and glass for hours. The ground is usually froze or has snow on it and thats what your sitting on. With wool you can sit for hours without getting your keister cold. With synthetics you'll be cold in 15 minutes. The weight really isn't an issue it only amounts to ounces. You'll never notice that. The benefits outway the negatives IMO.