I run several days a week so I use plenty of shirts.  After repeated washing, even top brand shirts from Under Armour tend to shrink up, mainly at the bottom.  Sexy as it is running in a half shirt...

So I go for value and function rather than spending $30 - $40 per shirt only to have them wear out.  At $15 - $17 these shirts are the ticket.  They have a breathable weave, so they aren't suitable for cold weather running.  But moderate to warm weather these are fine.  And below 50 I would wear this shirt under a light jacket and it works great.

Nice price.  I bought orange, red, and blue direct from Amazon with Prime shipping included.  $12.50 for the red, $15 or so for the other colors.