What's the signifying traits of Neapolitan tailoring?

Neapolitan tailoring, when compared to its British counterpart, is generally more relaxed and informal. The armholes are usually larger, offering a wider range of movement and the shoulders less padded providing a more natural look. Most famously, however, Neapolitan tailors traditionally use a "spalla camicia" (a "shirt shoulder") on their suit jackets. This means the jacket sleeve is attached into the armhole in the same way  a shirt sleeve would be, giving it some light crumpling at the top where it meets the shoulder.