Sunshade nets act as a shield against the harmful effects of excessive sunlight. They provide a regulated environment by diffusing sunlight and reducing its intensity.
Weed control mat works fine on its own, but it's usually best to cover it with a decorative mulch, rock, or other ground cover. The weed mat ground cover separates the cover material from the soil
Weed mats need to be thick enough to be able to prevent light from reaching the soil. Even the slightest sliver of light can start germination, which will cause weeds to grow.