The Glycerin GTS 20 shoe from Brooks is a running shoe for neutral foot type that is suitable for all distances. It offers good cushioning and support and is especially suitable for runners who are looking for a comfortable, responsive shoe. The upper of the Glycerin GTS 20 is made from breathable mesh and has a 3D Fit Print overlay construction for added support and stability. The sole of the shoe is made of rubber and has a flex groove for better mobility and a natural rolling motion. The Glycerin GTS 20 also features DNA LOFT cushioning for a soft, responsive ride. It also has a 3D Fit Print insole for a custom fit and support. Overall, the Glycerin GTS 20 is a comfortable and supportive shoe that is suitable for all distances.