A sweater is a knitted garment worn to provide warmth, typically made from materials like wool, cotton, or synthetic fibers. It comes in various styles, including crewneck, V-neck, turtleneck, and cardigan, and can be worn as a layering piece or on its own. Sweaters are popular for both casual and formal wear, offering comfort and versatility during cooler weather. Whether lightweight or chunky, they are a wardrobe essential that pairs well with jeans, skirts, or trousers for a cozy, stylish look.