Using a denser material than the wolford fatal 15 but with the same wonderful quality as their cousins these tights the are a wonderful winter friendly item 55 denier really is the perfect denier for the holidays its often ignored as people go for something a lot higher for the warmth but with a quality brand like wolford their cutting edge technology can make even semi opaque items wonderfully snug at 55 denier these fatal tights still show the curve of your legs as they arent too woolly an