The name of the Puma Hybrid Runner comes from the two mechanisms used by its midsole. To produce a brand new HYBRID technology, a full-length IGNITE foam package is lined with hundreds of NRGY beads. This results in underfoot cushioning which is comfortable, responsive and highly durable in equal parts. Improving the level of comfort of the runner is a breathable knitted top that wraps around the foot like a sock for more support.