A leader in Activewear, Sportswear, Performance Wear and Fashion Apparel - Made in USA

Full-Service Apparel Manufacturing

Based in Los Angeles, we specialize in the manufacturing of apparel for women, men and children. With a broad range of solutions, we can strongly meet the development and production needs of established and emerging brands.

Sourcing Theory is committed to efficiency, communication, and quality. It is our goal to be much more than a private-label contractor. We aim to be a pinnacle partner for all of your creative and production needs.


Sourcing Theory is a full-package, private-label manufacturer based in the heart of the fashion district of downtown Los Angeles, California.

We provide a domestic production... (more)


Take your concept drawings and reference materials to these factories. They will assist in refining your concept and thinking through the components involved in the Making Process.


Pattern makers will make a blueprint of your idea. They make sure your design will be well-constructed.


Material suppliers will provide you with the raw materials and components of your end product.


Sample makers will assemble the first end product prototypes.


Tooling factories produce custom tools that accelerate the production time of the end product.


These factories will mass produce your designs.