When sourcing white shirts, the fabric composition and weave are paramount. For premium markets, prioritize 100% Long-Staple Egyptian or Pima Cotton due to their superior softness and durability. For the 'Easy Care' segment, a 60/40 Cotton-Polyester blend offers better wrinkle resistance. Pay close attention to the Yarn Count; a higher count like 80s, 100s, or 120s two-ply indicates a finer, denser, and less transparent fabric. Common weaves include Poplin (smooth and formal), Twill (durable with a slight sheen), and Oxford (casual and textured).