Which of the following fabrics relies on a specific style for its material composition?

The fabric that relies on a specific style for its material composition is Seamless. Seamless construction is characterized by a method of designing and creating garments without traditional seams, which helps to minimize chafing and enhance comfort. This technique often involves the use of advanced knitting technologies that allow for a continuous piece of fabric to be crafted in a specific style that fits closely and moves with the body.

In contrast, the other fabric options, such as Everlux, Ultralu, and Nulux, are all unique Lululemon materials that serve different performance purposes but do not share the specific style-based material composition that Seamless does. Each of these materials focuses on different functional attributes like moisture-wicking, breathability, and stretch, rather than a specific construction style.