The cotton is combed, which means that it receives a physical treatment where the small fibers that can stick out from the cotton thread are removed.
This means that you get both a stronger and softer piece of fabric, which also retains its softness exceptionally well after washing.
If you can measure and weigh, the t-shirt has a weight of 160gr/m2...
In plain Danish, this means that it is a nice light product by the metre, without being thin or transparent!