I was searching for a slim fitting wide, neck undershirt to wear under my sweaters for this winter. I get smelly pits no matter what I do and having to wash a thick sweater after wearing it for only a few hours when it really isn't dirty, except for my armpits was frustrating. I came across this shirt, and based on the reviews, decided to order a small and a medium to see which one would be the best next to skin fit. Happily the small fits perfectly. It is very thin and very lightweight. I wouldn't wear it on its own as a T-shirt but for my purpose of wearing underneath sweaters for the winter it's perfect. For reference I am 5'5" 145lb with a slim athletic build. The reviews were so mixed on whether or not it was too tight or too loose from people with similar measurements that I decided and take advantage of icebreakers free returns to send back whichever had a looser fit, which was the medium.
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