i have been wearing these shirts for years.  workouts, casual wear or a base layer.  excellent performance, so comfortable all year round.  and they seem to wear forever after repeated washings.  very little fraying after a year of numerous wear and washings.  my only complaint:  it seems to me that the 'midnight' colored shirt is a little longer than the other colors.  and as i am tall (i wear the xxl)i only buy the midnight colored shirts.  just something i had noticed when i bought my original shirts in a retail store during the last couple of years.