A quality pair of jeans is one of those crucial wardrobe must-haves for every modern man: classic, effortless, eternally cool. Traversing all social and economic divides and the ultimate go-to on casual Friday, it pays to give a little consideration to these hard-working guys. To guide you in your search for the next ultimate pair, we’ve put together a denim encyclopaedia, complete with styles, types and care how-to’s.