Sweet! Runner's World deemed Glycerin 8 "Editor's Choice" in its Spring 2010 Shoe Guide in the March 2010 issue.Cushioning gets cushier in the new Glycerin 8. Brooks DNA makes its debut and raises the neutral bar by delivering a customized ride for runners of all sizes and speeds. Working with BioMogo, Brooks DNA responds to your every step, dispersing impact and providing ideal comfort and protection as the pace changes. If asked for the secret to your improved endurance, just tell 'em it's genetic.