One top, all conditions. That's the mission of this top. Our first choice for a first layer. When winter weather hits, you can wear it alone or wear it in layers, but you definitely want to wear it. Slides on smooth. Wicks wetness away fast so you stay warm when it's cold out. 100% poly. 6" zipper. Only at T9. S(4-6), M(8-10), L(12-14), XL(16)