Via HSN press release:
Inventor and entrepreneur Joy Mangano, President of Ingenious Designs, LLC, a subsidiary of interactive multichannel retailer HSN, has partnered with Grasshoppers to unveil a new footwear collection incorporating style, comfort, and innovative breakthrough technology to enhance overall well-being every day, all day. Launching on May 3, 2010, Performance Platforms(TM) with patent pending Get Fit(TM) Technology by Grasshoppers will be exclusively available at HSN and HSN.com.
... Performance Platforms(TM) with Get Fit(TM) Technology by Grasshoppers shoes are smartly designed to promote muscle activity, while walking, and tone key muscle groups including calves, quads, and hamstrings.
Read full press release here.