The MTN RACER features a 30mm x 25mm stack height. Topo's proprietary Vibram® Megagrip outsole design delivers optimal traction on any surface. Slightly firmer than the Ultraventure, the 3-piece injected EVA midsole is performance tuned for trail racing and speed-hiking. A lightweight rip-stop mesh upper with printed overlays offers a secure fit, while medial and lateral drainage ports enhance water release and quick drying. A 5mm anti-microbial Ortholite® footbed resists compression set and odor.FEATURES:WEIGHT: 9.3 OZ // 264 G (M9)RUBBER OUTSOLE: 6mm MIDSOLE: 19mm EVA (HEEL) // 14mm EVA (BALL)FOOTBED: 5mm, TOTAL STACK HEIGHT: 30mm × 25mm, DROP: 5mm