rma4043905 wrote a review of I/O Bio Merino Universal Crew Shirt - Long-Sleeve - Men's on September 28, 2010
I bought two to try. I have used synthetics for years as a base layer. They wick well but stink to high heaven. I will often have to change shirts 3 to 4 times in a 24 hour shift. I wore one of these for two days straight and think I could have gone longer without driving anyone out of smelling range. I have since bought more. I do, however, wish they came in tall sizes.