June 14, 2026

The global undershirt market continues to evolve as buyers prioritize comfort, fit consistency, and skin-safe materials. For B2B purchasers—startup brands, wholesale distributors, and sourcing managers—the challenge isn’t just finding a factory; it’s finding a manufacturer that can deliver wholesale-grade quality even at lower order volumes while supporting certification requirements for target markets like the U.S.

The global seamless apparel market reached USD 69.65 billion in 2025 and is projected to reach USD 123.67 billion by 2033, growing at a CAGR of 7.4%. Advances in 3D knit-to-shape manufacturing have become particularly influential, enabling producers to minimize fabric waste, reduce labor intensity, and shorten production cycles. For B2B buyers sourcing seamless underwear,