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"Very comfortable heavyweight base layer; also comfortable as a stand-alone layer down to the upper 20's. Face fabric feels durable and cuts the wind pretty well. Got a size medium which is a nice relaxed but not loose fit for my 5ft 10 inch 170 lbs; also bought a size small for layering underneath shell pants when things get really cold. The small is a trim, but not snug fit for me. These are definitely a step above other similar things I have for the same intended use."
