I started using these shirts a couple of years ago, and love them!  I actually use the white version as undershirts beneath my dress shirts for work - and for this purpose they work amazingly well.  The collar holds up beautifully (no bacon neck ever, not even after two years of constant use).  They don't fade much as all.  They feel smooth and silky.  Most importantly, they wick up moisture really well, keeping me high and dry.  As a bonus, they are not nearly as expensive as other shirts in this category.  I highly recommend them for athletic wear, or beneath you business dress shirt.