Stay agile and fast on every run with the incredible responsiveness, advanced cushioning, and superior flexibility of the Newton Running Gravity 9 running shoes. Predecessor: Gravity 8. Support Type: Neutral. Cushioning: Lightweight, flexible response. Surface: Road. Differential: 3 mm. Anatomically designed 3-D engineered air mesh upper with a seamless construction for a comfortable, breathable fit. Flexible and breathable tongue and collar. Anatomically designed skeletal tongue fits perfectly to the foot for easy comfort. Advanced lacing system for a secure and comfortable fit. Soft fabric lining offers a great in-shoe feel. Removable, full-length cushioned footbed for excellent underfoot comfort. High-rebound EVA midsole with Newtonium foam cushioning provides more responsive cushioning closer to the foot. Biomechanical metatarsal sensor plate. Action/Reaction technology creates a responsive, trampoline-like cushioning system that provides quicker bounce-back and loses less energy than a traditional foam-core running shoe. Durable rubber outsole with tactical flex grooves to mirror foot motion. Imported. Measurements: Weight: 8.3 oz Product measurements were taken using size 8.5, width D - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.