Au Natural is a **premium American women's intimate apparel brand** specializing in **Merino wool underwear, seamless intimates, everyday essentials, and sustainable undergarments**. Founded by **three sisters—Christina Vilicich, Erika Sliwak, and Rebecca Sliwak**, the company was created after they became frustrated with uncomfortable, low-quality underwear that failed to meet women's everyday needs. Their mission is to redefine women's intimates by combining **comfort, style, functionality, and natural materials** through the use of **Merino wool**, offering long-lasting underwear that feels soft, breathable, and healthy to wear. Au Natural is also the **first Woolmark-Certified underwear brand in the United States**, reflecting its commitment to premium quality and ethical sourcing. The company's product portfolio includes **Merino wool bikinis, thongs, briefs, seamless underwear, high-waisted styles, and everyday intimate essentials**. Every product is crafted using **ethically sourced Merino wool**, a natural performance fiber known for its **breathability, temperature regulation, odor resistance, moisture management, and exceptional softness**. Au Natural emphasizes sustainability by sourcing wool through a certified, traceable supply chain and encouraging customers to invest in fewer, higher-quality garments that last longer. Its products are designed for everyday wear, travel, fitness, and active lifestyles while delivering a lightweight, "barely-there" feel and supporting intimate health through naturally breathable fabrics. Operating through its direct-to-consumer online store, Au Natural serves customers across the United States while promoting sustainable fashion and educating women about the benefits of natural fibers. The company focuses on responsible manufacturing, premium craftsmanship, and environmentally conscious practices that reduce waste without compromising comfort or performance. By combining innovative material technology with thoughtful design, Au Natural has established itself as a trusted brand for women seeking luxurious, durable, and eco-friendly underwear made from one of nature's most versatile fibers. **Simple summary:** Au Natural is an **American sustainable underwear brand** that creates premium women's intimates using ethically sourced **Merino wool**. Founded by three sisters, the company combines natural materials, exceptional comfort, and environmentally responsible manufacturing to deliver breathable, odor-resistant, and long-lasting underwear designed for everyday confidence and performance.