This is a Wind Breaker. Yet it has a small thin Lining inside. It perfect for those brisk days in the 60 degree temperature. The 3X fits perfect. So I assume the other sizes are spot on. It's comfortable and looks good. I Love the small zip breast pocket. ONLY draw back for me is the "Crimped" Stretched sleeve opening. Sorta seals you in and I get a bit toasty. And I suppose that is the point? It keeps in your body heat for sure. But I wish they had been a draw string. All in All a nice Wind Breaker.