Sweats are having a moment. We first spotted the sweatpants trend picking up on the spring 2010 New York runways, and now Rafael Nadal and Kobe Bryant star in Nike's new Nike Sportswear look book expressing solid machismo in the gym-friendly fabric. The tennis player and basketballer are among seven athletes in the new campaign shot by David Sims and styled by Karl Templer, and the products drop in stores today. And while we're skeptical of embracing a trend that is typically seen on lazy college students who can hardly get dressed enough to walk two minutes across the quad, the way Nadal and Bryant wear the comfy cloth might just change our minds. Nadal is even wearing two sweatshirts. He must be hot in there! Yes, of course he is. Sweaty, sweaty hot.