New materials and construction across the upper of the Brooks Glycerin 19 Running Shoes create a more comfortable, secure fit. The 3D fit print upper provides strategic stretch and structure with a soft interior liner enhancing the comfort of the fit.Full-length DNA Loft cushioning runs through the midsole for soft landings and smooth transitions from heel to toe. A better fit and smoother stride deliver long-lasting running comfort in the Brooks Glycerin 19.