The Brooks Glycerin 20 is a neutral, all-round running shoe. This shoe belongs to the 'Run Visible' collection and has extra reflective elements to increase visibility in the dark. The extremely soft Glycerin 20 is designed to provide comfort and super soft cushioning while running. The new plush and breathable designed air-mesh upper offers a snug fit that keeps the foot comfortably in place. The upper is reinforced in strategic places for more structure and targeted support. In other places, the upper is more flexible for more freedom of movement. The midsole has been slightly revised and improved. The DNA LOFT v3 cushioning material is integrated with nitrogen for soft, lightweight cushioning. Despite the soft feeling, the Glycerin 20 returns sufficient energy. In addition, the material is very durable. The redesigned midsole and outsole provide a widened platform for smoother, easier transitions. The shoes are ideal all-round running shoes from walking to endurance running.