Lululemon now has a monopoly on "anti-stink" fabric. 

The brand has a deal to be the exclusive retailer for X-STATIC antimicrobal technology from Noble Biomaterials, reports Saabira Chaudhuri at the Wall Street Journal. 

The technology has been used in the brand's Silverescent fabrics since 2005, the company said. 

In the past, Nike and Adidas have sold workout clothing with X-STATIC technology. 

The special fabric is woven with silver. When the wearer sweats, the silver oxidizes, eliminating odors, according to X-STATIC's website. 

Lululemon shares are crashing after the company cut its forecast today. 

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