Dive summary: 

• The NFL is slated to run a 16-page insert titled "The Savvy Girl's Guide to Football" in the September issue of Marie Claire; the guide is a continuation of the league's four year campaign to market the league and league apparel to women. 
• The league is working with seven other women's magazines including Cosmopolitan, Vogue and Us Weekly, as well as a digital component that includes dedicated tweets. 
• According to Sports Business Daily, more than 50% of women watch regular season NFL games, and a rep told AdAge that women's jersey's are the fastest growing consumer product business. 

From the article:

"The guide represents the increasingly collaborative relationship between the editorial and business sides of publishing. The editorial team at Marie Claire produced the content, which includes tips on hosting a Super Bowl party and a guide to 'quarterback bromances,' on its own. But the magazine wouldn't likely have dedicated so many pages to football without a sponsor, Ms. Berger Cardone said."