Flannel is composed of which fiber?

• A. 100% Cotton
• B. 100% Polyester
• C. 50% Cotton 50% Polyester
• D. Wool

Answer: (A)

Flannel is traditionally a cotton fabric. Its soft, warm feel comes from brushing cotton yarns after weaving, which creates the fuzzy surface that traps air for insulation while staying breathable. Because of this classic cotton-based construction, 100% cotton best describes traditional flannel. Fabrics made from polyester would lack the natural softness and moisture-absorbing qualities of cotton, and while blends like cotton-polyester or wool-flannel exist, they represent different variations and are not the standard form most people think of when they hear “flannel.” So the fiber most commonly associated with flannel is cotton.