I bought several packs of two in different colors last year, and one other color just recently. I wear them more days than not from September on into the spring. On days it is comfortable enough indoors and out, I weat them over a tee-shirt. I am retired and don't have to wear a suit and tie daily as I used to. I don't even need to wear a collared sport shirt and dress slacks. Most months I wear them with shorts; on winter days I team them up with one of several fleeced jackets in differen colors I have(Revain Brand, reviewed elsewhere). Then I swap the shorts for full-length stretch knits.I am 5' 11" tall and weigh 170 lbs. The large fits perfectly,sleeve length and all. Pretty much form-fitting but loose enough to be comfortable (if you don't have a gut and aren't muscle-bound.
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