I e-mailed Jerry to ask him the weight of the SWK standards. He said the are about 10 oz. The wool heavyweights are 16 oz. So the SWK standards are close to the weight of lightweight wool even though they are acrylic. I have found the standards plenty warm in the 30-40 degree range. Of course, if there is a strong wind that brings the windchill factor into the 20s, the standards can feel cold if you remain outside.

Darrell