American Custom Sail's are built at our production loft in the US. This ensures each sail gets the attention to detail it deserves for the price. Unlike most major sail lofts Offshoring and Profit Maximizing are not part of the ACS ideology. An exception is made for our membrane products. We work with manufacturers in Italy and China to provide the same top end sails as our competition. The membranes from both have been carefully vetted and tested to make sure they fall within the ACS standard. Our designs, our specs, our quality, finished in the US.