For the City Series III, we continued the vintage athletic theme, but wound the clock back a few decades to that iconic "stadium" wool & satin look but with a few subtle upgrades. The 9.5 oz tech polyester serge is similar to but nicer than what's currently used in the "league" and has a few advantages over wool blends. Wick n Dry - engineered to wick moisture away, stay drier, cooler and more comfortable. The Serge Twill weave is resilient & better able to withstand wear and tear. A timeless green satin underbrim / front panel lining "cap" it off. Made in Los Angeles, CA. USA