I have many colors of this exact top for warm weather riding; they are wonderful. But this particular color (polka dots) is much snugger for some reason. Because I buy them bigger than I need, this tightness is tolerable and so I will keep it. But if you really like a roomy fit, size up to be comfortable.Very comfortable spf golf shirt! Lightweight, soft fabric. Fit is true to size. I like that it wasn’t too clingy! I’m 5’0” 130 lbsand ordered medium.I am a firm 2x person and this shirt is made a little small. The material itself was wonderfully soft and love the little air pockets under the sleeves for a cool breeze.. However the chest part was a little too tight for me and the sleeves were a little long for me. I would have kept the shirt if it was a little bit more room in the chest area..I did not wear it outside to tell you how it felt in the sun.Have many of these tops in different brands, this. Rand runs extremely small. Disappointed.Keeps me cool for long days in the sun. Would definitely buy it again.