I bought these shirts as a Christmas gift for my son-in-law, who works construction indoors and outdoors.  He has worn them almost daily since that time, and they are not showing any wear.  I have worn long-sleeved Carhartt pocket t-shirts for at least the past ten years, and have been more than satisfied with them.  My son-in-law is sold on Carhartt now as well.

The material is heavier than most other t-shirts and is very durable, the sleeves actually reach and cover the wrist, but can easily be pushed up to the mid-forearm when you need them out of the way.  The tails are generous and keep drafts from going up your back.  The colors do not fade, nor do they bleed or transfer to other fabrics.  I wash my black shirts with the light heather colored shirts without any problem.  I dry them on high heat, and have never had any shrinkage.