Brooks Glycerin Flex

Brooks Glycerin Flex review: what runners say

Fit

True to size, flat-knit upper with sock-like construction that wraps the foot precisely. Narrow toebox: no wide option available at launch.

Feel

Max-cushion level of cushioning with a freer ride feel thanks to midsole cuts. Ride runs on the firmer side, with modest energy return; the shoe livens up as pace increases.

Durability

After 150 km, wear is concentrated on the outer outsole and forefoot; the foam shows no breakdown. Dense rubber coverage over contact zones suggests good overall longevity.

Best for

Daily trainer for easy runs, midrange and long distances at moderate pace. Suited for runners up to 165–175 lb without significant overpronation who want a natural-movement feel without sacrificing protection.

Weak points

Narrow toebox with no wide option, unusual for Brooks. Tongue is not gusseted to the upper and tends to fold during lacing. The flexibility does not translate into noticeable propulsion.

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