The Low-Density Supersonic Decelerator Project will test inflatable decelerators and advanced parachutes in a series of rocket sled, wind tunnel, and rocket-powered flight tests to slow spacecraft prior to landing. This technology will allow NASA to increase landed payload masses, improve landing accuracy and increase the altitude of safe landing-sites.
Watch a video of rocket sled testing:
https://www.nasa.gov/multimedia/videogallery/index.html?media_id=137469801#.VQr3_0jJzyE