Focus on the road ahead, not your feet! Powered by seamless motion and unstoppable performance, the Brooks Glycerine 21 lets you unleash your true running potential. Made for smooth rides and better transitions, these sneakers let you maintain the rhythm of your stride with ease and confidence. The 2mm of nitrogen-infused DNA LOFT v3 provides an extra burst of cushioning and responsiveness, while the broad platform delivers a good mix of impact protection and built-in stability. Lace up the Brooks Glycerine 21 to keep your head high when the finish line is in sight. Engineered warp knit upper offers maximum breathability, flexibility, and comfort. New RoadTack rubber that's lightweight, resilient, and made using a mix of rubber and recycled silica adds sustainable comfort. Stack height: 28:18. Offset: 10 mm.