- Reebok Unisex' Premier Trinity KFS Shoes Retro running style remade for today Originally made for the road. Reworked for the streets. Designed to be the pinnacle of Performance Running, these Reebok shoes are a bring back from the Premier Running Series from 2006. A Kinetic Fit System offers support and flexibility to keep every step comfortable. DMX Foam technology offers lightweight underfoot cushioning. Specifications Kinetic Fit System® Comfort, support and flexibility in critical areas of the foot DMX Foam midsole for underfoot cushioning Full rubber outsole Parent Sku:100074434