Brooks Glycerin Flex - Plush Comfort Meets Natural Motion

Stay connected to every stride with the Glycerin Flex. Combining generous cushioning with midfoot flexibility, this trainer adapts to your natural movement pattern whilst delivering the plush comfort Glycerin fans expect. From easy morning miles to gym sessions and everything in between, the Flex gives your foot freedom to move as it wants.

Adaptable Cushioning Platform

Nitrogen-infused DNA Tuned foam combines large cells in the heel for airy landings and small cells in the forefoot for powerful toe-offs. The 36mm heel and 30mm forefoot stack height delivers substantial cushioning without the rigid feel of max-stack trainers. This dual-density construction absorbs impact with every footstrike whilst maintaining responsive energy return when you pick up the pace.

Midfoot Freedom

Strategic cutouts and asymmetrical flex grooves change how the shoe behaves through the stride. Rather than feeling like one solid slab rolling forward, the platform flexes and "opens up" as you move—it works with the biomechanics of your feet, rather than controlling them. The FlexZone™ technology allows the heel and forefoot to move semi-independently, creating smoother transitions and reducing the internal cost of rigid shoes fighting against your natural gait.

Versatile Performance

The flat-knit upper hugs the foot comfortably whilst providing breathability during hard efforts. A 6mm drop allows your foot to land where it wants without forcing heel striking, making this suitable for various paces and distances. Whether you're knocking out daily training miles on tarmac, adding tempo intervals, or transitioning from pavement to treadmill, the Glycerin Flex handles diverse running demands.

Key Features:

- DNA Tuned nitrogen-infused foam (dual-density)

- FlexZone™ midfoot technology

- Engineered flat-knit upper

- Strategic cutouts and flex grooves

- Decoupled heel design

- Suitable for gym workouts

Best For:

- Daily training runs

- Long runs

- Easy recovery miles

- Gym workouts

- Road running

Is This the Right Shoe for You?

Ideal for runners who want maximum cushioning without the stiff, restrictive feel some heavily cushioned trainers impose. Brooks discovered runners wanted more control, and the Glycerin Flex provides exactly that. The FlexZone™ technology particularly benefits runners with mobile midfoot joints or those who prefer a less structured ride. This natural feel makes the Glycerin Flex more versatile than just a cushioned training shoe—it doesn't feel too soft or sluggish when running at quicker paces. If your training includes varied sessions and you need comfort for the long haul whilst maintaining natural movement patterns, the Glycerin Flex manages that balance effectively.