What is athleta rn54023?

As an AI language model, I don't have access to current information or the ability to browse the internet, however, from my understanding, Athleta RN54023 is not a product or item, but rather a registration number or code for the Athleta clothing brand. This code is commonly found on the tags of their clothing items, indicating the specific style or design of the product. Athleta is a popular fitness apparel brand, offering a wide range of activewear, including tops, bottoms, jackets, and accessories for women. Their clothing is known for its high quality, durability, and stylish designs, and is frequently worn by athletes and fitness enthusiasts.