It's ueither but specifically ueither with horizontal patterns, any intricate designs don't last as long.

I bought a pack of 5 while at uni in 2011 and they're still going strong today, I have 10 others since then which are as good, but the one time I bought picture designs rather than straightforward stripes they lasted maybe 3-4 years, which still isn't horrible tbf.

There's nothing particularly special about them, they're 80% cotton, 17% polyester, 3% elastane. They just seem to last forever and feel great.