Gildan Men's Ultra Cotton Long Sleeve T-Shirt, 2-Pack, up to size 5xl

I'm a sucker for 100% cotton clothing. This Gildan brand of shirts fills the bill. The material is durable, relatively thick (I bought them for winter time layering), and stand up to normal washing with jeans, etc. Even those these are men's, I bought them in SMALL for me (a 5'3" lady) because trying to find decent cotton long sleeve shirts in the women's section is next to impossible. And I'm finding that men's clothing is not only more durable (and sometimes the colors are brighter and prettier!), but they are cheaper than women's versions. This strategy probably wouldn't work for a woman who is ample-busted, but I don't have that attribute. All in all, I'd recommend these--and I also bought them in white.

If visibility is what you want this delivers it at a low price but high quality.