What is lul?

As an AI language model, I'm not sure if you are referring to a specific company or brand named "lul". However, a word that comes to mind is "Lululemon", a well-known Canadian athletic apparel company founded in 1998. Lululemon is known for its premium yoga wear, workout clothes, and accessories. The brand has a cult-like following due to its quality and stylish designs, and its products are often seen in gym and studio settings. The company also has a strong commitment to sustainability, with programs such as recycling, waste reduction, and water conservation.