AfterPay Available - Experience supreme softness and maximum comfort in the Brooks Glycerin 21, a premium option for long-distance runs and daily kilometres. It boasts an extra 2mm of ultra-plush, nitrogen-infused DNA Loft v3 and a broad platform that allows the Brooks Glycerin 21 to achieve an ultra-plush ride with smooth transitions that absorb the impact of running. An all-new engineered warp knit upper keeps the weight of the shoe down while providing enhanced structure in crucial areas.