The Glycerin 17 is designed to offer the highest level of cushioning. DNA Loft cushioning is a soft and highly absorbent material designed to reduce the impact of running. A new Ortholite sock-liner makes the new model feel plusher than previous versions. The upper uses 3D printing and a double jacquard mesh to deliver ultimate comfort. This is a great option for runners looking to make long runs easier and slower runs more comfortable.