The description says "athletic" or slim fit and boy do they mean it! Bought the XL based on guidelines and let's just say I need to shed a few pounds!

Great feel though, love the color. Need more color options :-)

I got this hoodie for five weeks of SUP camping. I wanted something lightweight that would fit over my hydroskins and under my PFD and would provide sunblock...but then I could wear it around my campsites at night and be cozy. I wore this hoodie for five weeks and washed it once (because I fell on a mudflat). It performed exactly as I needed it to...it was totally awesome. Not itchy (absolutely clutch), great neck coverage, super length and hood. Now. I am 5'4", 130 lbs, and wear H cup (yes, there is such a thing) bras. For me the medium was probably more form fitting than I would normally wear, so it'll be a base or mid layer now that I am done paddling. BUT, I wanted that fit for the whole "over the wetsuit/under the PFD" thing. All in all I'm super glad I bought it and that it was my shirt for five weeks.

This sunshirt is so good! I just used it for a four-day canoe-camping trip and it held up great to mud and bogs and hauling heavy packs on and off and scraping against branches. No weird sour smell like you'd get from a synthetic shirt! It protected my skin and wasn't too hot in 80+ degrees.
I'm 5'2 and normally wear an XS or S. I ordered a small, and it's a good fit with room to breathe.

Great product. I had an issue in the order process and the customer service went above and beyond in rectifying the situation. They are a great company that makes great products.

Recently had 4 pre-cancers removed because I'm fair skinned and love being outside. I've always found synthetics to be hot and stinky. Invested in this sun shirt and I am so happy. So far I've hiked over 20 miles in it through various colorado summer weather and have absolutely loved it. I normally wear a M, but sized up to a L for some room, glad I did because I think the arms would have been too tight for my weight-lifing biceps.