Who doesn't like t-shirts? Idiots, that's who. What's not to like? You can wear them all the hours of the day. They work equally well in the shower as they do in the pool. They function as both daywear and eveningwear. Surly tripled its functionality by adding a pocket. A POCKET!!! Now they've taken that infinitely versatile garment (it's the Cross Check of Clothes) and had it made out of (what Surly would call our their favorite material) merino wool (after steel and rubber, silly).
In short, it's a t-shirt, it's wool, it's got a pocket (A POCKET!!), you wear it. Donzo.