* Support: Mid Support Cushion: Most Cushioning Road Running

What's new in the Glycerin GTS 21? Brooks has incorporated more DNA Loft than ever for extreme softness and an engineered warp knit upper that is flexible, accommodating and soft providing a better fit.

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• Engineered warp knit upper is flexible, accommodating and soft
• Plush interior liner: Surrounds your foot for a snug but flexible fit
• Ortholite sockliner: Creates premium step-in comfort
• Most DNA Loft cushioning than ever: Provides extreme underfoot softness
• Full-length DNA LOFT V3 through the midsole: Makes the move from heel to toe feel incredibly soft and smooth
• GuideRails holistic support system: Supports your body in its natural motion path while keeping excess movement in check
• Drop: 10 mm