Mercerization is a chemical process where cotton fibers are treated with sodium hydroxide, enhancing their natural properties. This technique, pioneered in the 19th century, swells the fibers, creating a smoother surface, boosting strength, and improving dye absorption. The result? A fabric that’s stronger, softer, and more lustrous than regular cotton. Mercerized cotton resists pilling, retains vibrant colors, and feels luxuriously cool against the skin—making it a favorite for premium apparel brands.