Brooks Glycerin 19 include more of the DNA LOFT cushioning that has been engineered to provide you with a great luxurious feelunderfoot but without losing the responsiveness you require & makes every transition from heel to toe soft & smooth. The DNA LOFT transition zone on the sole ensures the movement from heel to toe is a smooth one. There is a more adaptable fit in the upper, thanks to the 3D Stretch Print, for a seamless & custom made feel that will have you thinking the shoe has been made for you personally. The Glycerin 19 also includes an orthoLite sock liner for a more plush feel. Designed to compliment a neutral running gait & provide a high level of cushioning.