Trail Adapt System utilizes an integrated midsole

Lateral Guiderail also provides support for calcaneal adduction in high deviators

Racerback construction with additional vertical straps

Long distance tri chamois

+ Carbitex™ AFX carbon-fibre plate is purpose-built for trail running

Men's Brooks Glycerin Flex US Size:13.0 Trail Adapt System utilizes anThe new rule bending Glycerin Flex running shoe provides a flexible, cushioned ride made to move with you. Brooks new strategically segmented midsole works as an extension of your body, putting you in control of your run like never before. Pair that with a breathable upper, and youve got a distraction free second skin the ultimate blend between human movement and tech. Unleash your feet The FlexZone (midfoot flex groove), plus the podular forefoot