These are wonderfully bright gypsy-style strings, the kind that Django would use. These are NOT for an acoustic if you are playing mostly folk, rock, or genres of that sort -they have a lot of high-end & are very "trebley", as suited for gypsy & other styles of music. Highly recommended for guitarists who play this style of music, as it's difficult to find these types of strings amongst all the standard-style acoustic steel's these days. These strings have a really vintage tone, likened to all the recordings from the 30s & 40s. Would definitely recommend these, as well as Thomann's excellent customer service!