The Northeastern US is the smallest but most populous region of the US. It has a continental climate, meaning cold summers and hot winters. It has perhaps the richest history and greatest influence on the US's history. It is also perhaps the most important part of the US today.
We cannot answer this question, because you did not give us enough information. Many countries have a "Northeast region" but you did not tell us which one. As soon as you do, we will be happy to tell you about the clothing in that region.