Stealth mode: engaged. Breeze through challenging terrains like a ninja with the plush cushioning and technical stability of the Brooks Glycerin Stealthfit 21. Updated and upgraded, these shoes reimagine underfoot comfort like never before with a nitrogen-infused DNA LOFT v3. Inspiring the name, the StealthFit construction delivers a fit so good that you'll feel unstoppable. The new RoadTack rubber is lightweight and resilient, just what you need for a satisfying run. Find your true running potential and never turn down the thrill of speed in the Brooks Glycerin Stealthfit 21. Brooks Glycerin Stealthfit 21 features: New engineered warp knit upper provides seamless structure. Redesigned midsole and outsole offer a widened platform for smoother and easier transitions. 2mm of DNA LOFT v3 underfoot offers even more plush cushioning. Stack height to 28:18 for a 10mm offset.