I think it works a bit. Returned for XXL. I think I'll wear this with a shirt underneath so it was too restrictive. I'm 6ft about 230 and the length was a little short and a little tight around my armpits. I wear a size XL in most Colombian clothing, so I guess it runs a bit small. No big deal, the return process was very pleasant. Received a replacement 2 days later. Good service.
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