HPR - as the heel impacts, the precise angle and bevel of the Brooks heel-strike pod sets the heel up in a neutral position to assure that the heel strike alone does not create undesired lateral motion, especially increased rate of pronation. The crumple zone releases the lateral side of the midsole which allows the foot to remain balanced as it phases into the pressure path. Most of our heel strike pods have HPR, a super-durable rubber compound developed specifically by Brooks for longer wear.
S-257 - this unique midsole compound is formulated to resist compression and rebound more quickly after impact than standard EVAs used in other brands. S257 has been tested to be 15% more durable than EVA which means your 400th mile has the same great ride as your first.
HYDROFLOW® - Brooks patented, silicon-based system is the most unique and effective cushioning system ever applied to a running shoe. Its fluid-filled centre chamber dampens shock at impact and dynamically disperses fluid at a controlled rate around the heel cushioning, stabilising and rebounding on every stride. Plus, it's engineered to never wear out.
DRB - (DIAGONAL ROLLBAR). When the foot comes in contact with the ground, it has a natural tendency to pronate. To help control this movement, we developed the Diagonal Rollbar. This patented, wedge-shaped piece of high density foam is positioned on the medial side of the midsole to reduce the rate and speed of pronation.
DRB ACCEL - to promote natural movement between the heel and forefoot, Brooks developed the DRB Accel. This component utilises varying durometers of thermoplastics which provide the torsional midfoot support runners need.
FOREFOOT HYDROFLOW® - the forefoot of the runner steps through the gaitcycle with the direction of movement going forwards. Flex grooves allow the shoe, from the midstance through to the propulsion phase, at pre specified positions to naturally form itself to the positioning of the foot. Shortly before the propulsion phase, BROOKS® Forefoot HydroFlow® and Substance 257 / MoGo cushion the foot, reducing any excessive strain.