Billionaire is a serious contender for the most luxurious brand of all. Where else can you find a crocodile-skin umbrella? Flavio Briatore’s ultra-sleek men’s clothing line offers eccentric and exotic designs with an understated Italian edge. Jackets are decadently rich, and many have shearling and fur accents. Embrace the out-and-out glamour with a pair of ruby-red, tasselled slippers.