A flat-felled seam is a type of sewing technique commonly used in garment construction. It involves folding the raw edges of the fabric inward and stitching them down, creating a strong and durable seam. This method is often found in jeans and workwear because it provides extra strength and prevents fraying. Flat-felled seams are also known for their neat appearance, as they hide the raw edges inside the seam. This makes them ideal for items that require both durability and a clean finish. They are commonly used in sportswear and outdoor clothing to withstand wear and tear.