The Tracer 2 running shoe is lightweight and responsive so you can achieve higher levels of performance. Predecessor: Tracer. Support Type: Neutral. Cushioning: Lightweight flexible response. Surface: Road. Differential: 4 mm. Breathable mesh textile and thin synthetic upper materials. Lace-up closure. Thin tongue and padded collar. Smooth fabric lining offers a great in-shoe feel. Removable foam insole. RMAT midsole provides lightweight responsive cushioning. PRO²LITE+ 10 midsole supplies a balanced blend of propulsion and protection. Rubber outsole. Imported. Measurements: Weight: 9 oz Weight of footwear is based on a single item not a pair.