Bold, Retro And Chunky, The Trinomic Xs-850 Is Inspired By Puma's Trinomic Tech From The Early '90S.The Honeycomb Cell Structure Would Collapse And Expand To Provide Cushioning, Flexibility And Stability That Was Unprecedented. The Trinomic Xs-850 Returns With An Ultra-Comfortable Feel, '90S-Inspired Color Palette And Classic Look For The Streets.