Tights deniers? Confusing or what. Here's how to tell those random-seeming numbers apart. 

10 denier: Miranda Kerr rocks barely there tights (they come into their own when you wear with an all-black outfit – stops you looking like a mime artist). We'd call this the foxiest denier, as it shows the skin underneath.
40 denier: Model Laura Love’s middle-coverage tights are the wear-with-anything option. 
100 denier: Blogger Ella Catliff’s total-blackout 100Ds are the warmest option – they also work well as a solid base against pattern and colour.