Very good quality and very soft. Tight fit (due to elastane), so if you want it to be more comfortable, choose a larger size.

After trying bamboo underwear from the same company - which I was extremely satisfied with - I gave their bamboo t-shirts a chance. They turned out to be exceptional, clearly softer and more elastic than regular cotton ones with a regular-to-slim fit. The only thing I cannot know at this moment is their durability over time.