French green beans, also known as "haricots verts," are a slender, tender variety of green beans. They are thinner and longer than regular green beans, with a more delicate texture and a slightly sweeter flavor. French green beans are typically bright green and crisp, often used in salads, sautéed, or steamed as a side dish. Because of their tenderness, they cook quickly and are often preferred in dishes where a finer texture is desired.