The Glycerin from Brooks is back and better than ever in this 22nd installment. This running shoe is updated with nitrogen-infused DNA Tuned cushioning optimized for plush landings and responsive toe-offs. TECHNOLOGY Run Type: Track, Road Pronation: Neutral Surface Type: Track, Road Soft flat knit upper offers a blend of stretch and compression that moves with your foot Nitrogen-infused DNA Tuned cushioning is optimized to be lightweight, responsive, and durable. The broad platform stabilizes your foot and promotes smooth heel-to-toe transitions Midsole drop: 10mm Weight: 9.1oz / 258.0g