Brooks Adrenaline GTS 16 running shoes have found a way to deliver an even better fit and balanced support in the Sweet-Sixteen edition. Deeper V-Grooves offer better release for an improvement in transitions and a more cushioned underfoot feel. Stability and smooth transitions describe the experience you’ll have wearing these fan-favorites.Upper: Conformable Saddle with adjustable eyelets pulls from the heel to create a more secure and customizable fit. Moisture-management mesh and linings allow access to airflow. Synthetic overlays provide lightweight support.Midsole: BioMoGo DNA midsole provides adaptive cushioning. Progressive Diagonal Rollbar (PDRB) provides added support. Full-length segmented crash pad delivers ultra-smooth heel-to-toe transitions. DRB Accel provides torsional rigidity to the midfoot, enhancing support while allowing the heel and forefoot to act independently. Combination Last enhances the fit.Outsole: Flextra in the forefoot is designed to provide necessary forefoot stability. HPR Plus higher durability, abrasion-resistant rubber wears longer. Blown rubber forefoot offers increased durability.