Whether you're training for a marathon or just enjoy a leisurely run, the Brooks Glycerin 21 is the ideal all-round running shoe for the neutral runner. Go for short or long runs; the Glycerin does it all. This makes it suitable for both beginners and experienced runners. Get the most out of every step with this all-round running shoe! Midsole The Glycerin 21 has Brooks' DNA LOFT v3 foam in the midsole. This foam is extremely soft and has an innovative character compared to the previous version. Nitrogen has been incorporated into the cushioning material to optimize responsiveness and cushioning. The foam has Brooks' DNA technology, where the foam adapts to your running style. This means the shoe has a cushioning foam that ensures a smooth transition from heel to toe. On top of all this, extra step-in comfort and long-lasting cushioning are provided by the ORTHOLITE insole. This air-permeable sole ensures that your feet stay cool while running. Upper The upper of this model gives your feet the comfort they deserve. The airmesh upper provides ventilation to keep your feet cool, and this material also encloses your foot comfortably. The 3D Fit Print technology adds structure to the upper and offers extra stretch in places where it is desired. Recycled materials have been used to produce the upper, sustainability and comfort come together in this shoe. Outsole The shoe has a RoadTack outsole, made from a mix of rubber and recycled silica. In addition, this outsole technology from Brooks is durable and resilient to compression, making them extra long lasting. Put on your Brooks Glycerin 21 shoes and prepare to push your limits!