Firstly, what is Denier?
Denier is the weight and thickness of the thread and yarn in hosiery. The lower the denier, the more sheer the tights or stockings will appear. The higher the denier, the more opaque (more coverage) the appearance of the product will be. Lower denier hosiery is great for spring or summer, whilst high denier hosiery is perfect for winter warmth and comfort.