O'Neill Sun Shirts are perfect for runners and outdoor enthusiasts seeking both comfort and protection. Founded by surf icon Jack O'Neill, the brand has a legacy of crafting apparel that blends style with functionality. O'Neill sun shirts are lightweight, breathable, and offer UPF 50+ protection to shield against harmful UV rays. Whether you're running, surfing, or just enjoying the outdoors, their performance-focused designs ensure durability and all-day comfort. Explore RunUnited’s range of O'Neill t-shirts, UV-protective shirts, and performance apparel to stay shielded and stylish on your active adventures.