Explainer — Why the Menswear Market Is on Fire

The future of fashion is menswear.

While the men’s department at most brands and retailers is still a fraction of the size of women’s, business is booming as shoppers trade in their skinny jeans and fitted suits for wide-legged trousers, loose-fitting tees and casual attire suitable for both work and social occasions.

At London-based luxury retailer MatchesFashion, sales of men’s clothing are up 40 percent compared to the same period last…