What feature do football shoulder pads need to have for proper shoulder coverage?

The essential feature of football shoulder pads for proper shoulder coverage is that the epaulets and cups must effectively cover the deltoid muscle. This is crucial because the deltoid is a key muscle involved in shoulder movement and stability. Adequate coverage helps protect this muscle from impacts during play, reduces the risk of injury, and allows athletes to perform at their best without the constant worry of being unprotected in a vulnerable area.

While other factors like adjustability, material weight, and ventilation can contribute to the overall comfort and performance of the shoulder pads, they do not specifically address the anatomical protection needed for the deltoid muscle, which is central to the effectiveness of shoulder pads in the sport. Thus, ensuring that the pads provide proper coverage in this area is the primary concern when selecting appropriate football shoulder pads.