What Are the Risks of Approving a Sample in a Non-Production Fabric?

Nonproduction fabrics can conceal differences in fit, opacity, recovery, shrinkage, and decoration compatibility.

Use the intended production fabric and construction for decisions that depend on stretch, recovery, shrinkage, or seam behavior. A substitute can support early development, but it cannot reliably validate every performance requirement of the final garment without further confirmation and testing. List which approvals must be repeated later.