Interlock fabric is a double-knit textile renowned for its softness, smooth texture, and superior stretch. Unlike single knits, interlock features a double-layer construction, providing added thickness and opacity. This fabric is commonly composed of cotton or cotton-blend fibers, offering breathability and comfort. Its tight weave and stretch properties make it ideal for form-fitting garments like T-shirts, leggings, and underwear, as well as for baby clothing due to its gentle touch against sensitive skin. Additionally, interlock fabric is favored for its resistance to wrinkles and pilling, ensuring durability and longevity, making it a go-to choice for casual wear and loungewear essentials.