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The Brooks Glycerin GTS 21 is a max-cushion road trainer with GuideRails stability. Its nitrogen-infused DNA LOFT v3 midsole gives a soft, springy ride, and the engineered warp knit upper wraps the foot without pressure points. GuideRails are rails along the sides of the midsole that guide the foot rather than forcing it, so mild overpronators get support without a harsh post. It suits runners who want plush cushioning for daily miles and long runs, and it is heavier than lighter neutral trainers at about 10.5 oz. Rivals like the Hoka Gaviota and ASICS Gel-Kayano offer similar stability with different feels; the Glycerin leans softest.
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Runners describe the Glycerin GTS 21 as a plush, protective daily trainer that keeps mild overpronation in check without a stiff post. Most praise the soft cushioning and comfortable upper; some find it heavy and a little slow for faster work.
The Brooks Glycerin GTS 21 is a men's road running shoe with maximum cushioning and GuideRails support for stability. It is made for daily training and long runs.
The midsole uses nitrogen-infused DNA LOFT v3 cushioning for soft, responsive comfort. The midsole and outsole are redesigned for smoother transitions. The GuideRails support system provides stability.
The engineered warp knit upper has a plush, breathable fit. The heel collar and tongue are padded for added step-in comfort. The shoe fits true to size.
