O'Neill is an American surf and lifestyle brand founded in 1952 by Jack O'Neill. The company is best known for its wetsuits, which are designed to keep surfers warm in cold water. O'Neill also produces a wide range of apparel, including t-shirts, hoodies, jackets, and swimwear. The brand has become a staple of the surfing community and is now sold in over 80 countries around the world. O'Neill is committed to sustainability and uses recycled materials in its products whenever possible.