The only issue I had with this shirt is that the sleeves are long and hit close to the fold in my elbow.  I purchased a small, and I am 5'10" and 145 lbs.  So most of the time small works (Under Armour, Nike, Brooks, Solomon, etc...).  But it's not really a problem, it's just weird when the sleeve hits my elbow crease.  I assume after a few more washes it will start shrinking.

The material isn't quite solid, it has a kind of airy, breathable knit, but not like the sandpaper feeling Adidas shirts.  This is more of a soft material with tiny, nearly invisible holes for venting.

Great for indoor or outdoor, warm weather running.  And the red looks cool!