The Mountain Short Sleeve Shirt is designed for those who want effortless comfort with everyday style. Patagonia built this slim-fit shirt from a lightweight blend of organic cotton and recycled polyester for breathable, easy-care performance. Its short sleeves make it ideal for warm days or layering under jackets for cooler weather. The clean button-front design pairs seamlessly with casual or active looks. A functional left-chest pocket keeps small essentials close, and the shirttail hem ensures it stays in place during movement