The Glycerin Max is the most shoe Brooks builds for the road: two nitrogen-infused foams tuned into a single midsole, a max-support platform, and a 6 mm drop that sits lower than the standard Glycerin. The shape does the rolling so you spend less of yourself per step.
It suits high-mileage weeks, recovery running, and anyone who finishes long runs with legs that complain about it the next day. The softness is a different thing from the Glycerin 22 rather than just more of it — landings largely disappear.
It is not a tempo shoe, whatever the stack suggests. There is no plate, it is close to 300 g, and the height that protects you in hour three works against you the moment you want to run quickly.