The brooks glycerin gts 20 is a premium neutral running shoe designed for road running. It features a soft and cushioned midsole made of dna loft technology which offers a comfortable and responsive ride. The upper is made of a breathable mesh material with 3d fit print overlays that provide a secure and supportive fit. The outsole is made of durable blown rubber with flex grooves that promote a natural range of motion. Other features of the glycerin 20 include a plush collar and tongue an ortholite sockliner for moisture management and a heel counter for added stability. Overall the glycerin gts 20 is a great option for runners who want a comfortable and cushioned ride for their daily training and long-distance running.