Men's Glycerin Stealthfit 21

Key Specifications

• Support Level: Neutral
• Midsole Drop: 10 mm (38 mm heel / 28 mm forefoot approx.)
• Weight: 9.3 oz (Men's size 9)
• Midsole Foam: Nitrogen-infused DNA LOFT v3 (stacked 2 mm higher than the previous version)
• Upper Material: Updated flat knit StealthFit construction combining stretch and compression
• Outsole: RoadTack rubber

Fit and Sizing Characteristics

• True-to-Size Length: Most runners find it fits true to standard running shoe length.
• Snug, Sock-Like Feel: The stretch-compression flat knit upper hugs the foot closely for a secure, distraction-free hold.
• Lower Volume: It offers less top padding and a more streamlined, low-profile fit than the traditional Brooks Glycerin 21.
• Lockdown & Lacing: Users agree that the low-profile padding requires care not to over-tighten the laces across the top of the foot.

Comfort and Performance Notes

• Upper Flexibility: The adaptive material moves naturally with the foot.
• Underfoot Cushioning: Features a broad platform paired with a 2mm higher stack of nitrogen-infused DNA LOFT v3 foam for a plush, soft ride

Best used For

• Daily Road Running: Built to handle regular road miles and treadmill sessions with a smooth, stable platform.
• Long-Distance Comfort: Features nitrogen-infused DNA LOFT v3 cushioning stacked 2mm higher than previous versions for maximum plush impact protection.
• Snug, Adaptable Fit: The flat-knit upper uses a stretch-and-compression blend that hugs the foot closely for a near-seamless feel.
• Casual All-Day Wear: The streamlined aesthetic and easy-entry pull tab transition easily from workouts to active casual wear