Ian wrote a review of Patagonia Capilene 2 T-Shirt - Short-Sleeve - Men's on August 23, 2011
This shirt can be worn day after day without getting too smelly. Wicks away moisture and odor. Seriously a great shirt.
The blue one can be worn on its own, the white is a little transparent.
The material is very tough.
My goto shirt for hiking and mountain biking. Absolutely!