The Nike Air Relentless 2 offers a blend of lightweight and structure which provides a supportive, minimalistic running shoe. Great lightweight upper with a midfoot TPU panel for lockdown. Phylite™ midsole with Air-Sole® unit in heel offers right blend of cushioning. BRS 1000™ in heel, non-removable insole, solid rubber Waffle® pattern. Wt. 7.7 oz.