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Brooks Glycerin Flex

In production · road · Recovery / Daily / Long run · $150

Soft, flexible take on the Glycerin for relaxed, unstructured miles.

Built for recovery, daily, long run, at a target pace of 8:30–11:30 /mi on road.

The spec sheet

Weight
277 g / 9.8 oz
Heel stack
36 mm
Drop
6 mm
Midsole foam
DNA Tuned
Plate
—
Cushioning
5 / 5
Energy return
3 / 5
Responsiveness
2 / 5
Rocker
2 / 5
Flexibility
4 / 5
Stability
3 / 5 (5 = most guidance)
Toe-box
Standard
Sizing
True to size
Durability
~450 mi
Price
$150

How it rides

The foam

The midsole is DNA Tuned, tuned very soft (5/5 on our cushioning scale). Energy return is moderate — comfortable and predictable rather than bouncy. 36 mm of heel stack is the modern daily-trainer sweet spot — enough foam for long miles without losing contact with the road. Combined, the ride reads as calm at 2/5 responsiveness.

The plate

There is no plate here. The midsole does all the work, so the shoe flexes naturally and stays versatile across paces — easier on the feet day to day, but without the snap of a plated shoe when you want to roll.

The geometry

A 6 mm drop is the mainstream middle — familiar to almost anyone coming from a standard trainer. The geometry is fairly traditional and flat, so the shoe follows your foot rather than steering it. The forefoot flexes easily, so the shoe adapts to slower, shorter strides. Support is light — neutral, with a mildly steady platform.

Fit, sizing & life

The toe-box is standard width — comfortable for most feet without swimming. It fits true to size. Expect roughly 450 miles from the outsole, about $0.33 per mile at $150.

For the foams and plates Brooks uses across its line, read the Brooks brand guide.

How it compares

Measured against the 542 currently-available shoes in the catalog. The bar shows where this shoe sits in that range.

Weight

277 g / 9.8 oz

2 g heavier than the catalog median of 275 g

Heel stack

36 mm

Level with the catalog median of 36 mm

Drop

6 mm

Level with the catalog median of 6 mm

Price

$150

10 cheaper than the catalog median of 160

Responsiveness

2 / 5

Catalog median 3 / 5

Cushioning

5 / 5

Catalog median 4 / 5

Energy return

3 / 5

Catalog median 3 / 5

Durability

~450 mi

Catalog median ~400 mi

Within the Brooks line it is lighter than the brand's median (283 g / 10.0 oz) and sits taller than its median stack (36 mm).

Closest alternatives

Current shoes with the nearest combination of weight, stack, drop, foam feel and plate.

On Cloudeclipse(2024)

275 g / 9.7 oz · 37 mm · 6 mm drop · — · $180

On's double-layer max cushion shoe for long, easy, protected miles.

Under Armour Infinite Elite 2

290 g / 10.2 oz · 36 mm · 8 mm drop · — · $160

Soft, protective daily trainer for high-mileage comfort.

Saucony Guide 19

275 g / 9.7 oz · 35 mm · 6 mm drop · — · $150

Center-path stability that feels neutral until you need it.

New Balance Fresh Foam 880 v15(2025)

281 g / 9.9 oz · 40 mm · 6 mm drop · — · $145

The dependable neutral trainer with genuine width options and long outsole life.

Saucony Guide 18(2025)

272 g / 9.6 oz · 35 mm · 6 mm drop · — · $145

Center-path stability with a soft, non-intrusive frame.

Lineage & siblings