High-melt-strength polyolefin elastomers with long-chain branching enable processors to expand the use of thermoplastic polyolefins (TPOs) in processes such as thermoforming, profile extrusion, injection molding, and blow molding, where conventional elastomers have previously had difficulty. The numerous benefits of long-chain branching include increased melt strength, reduced gloss, and enhanced shear thinning (for extrusion and injection molding), and these benefits have been demonstrated with polypropylene blends for both hard and soft TPOs. This presentation demonstrates the key performance features of TPE-olefin compositions that use these high-melt-strength elastomers.