The Mizuno Wave Inspire 21 is a propulsive stability trainer featuring dual-layer Enerzy foam with an eco-friendly Enerzy NXT heel wedge, a support-type Wave Plate, and durable X10 rubber—delivering smooth transitions, heel-strike control, and all-day comfort.

- Enerzy NXT heel wedge: an eco?friendly Pebax?RNEW® foam designed for softer landings and springy rebound
- Enerzy foam top layer: balanced cushion that retains responsiveness and energy return
- Support-type Wave Plate: guides and stabilizes footroll along medial side without feeling rigid
- Lab-tested specs: 38?mm heel, 25–26?mm forefoot, and a 12–12.9?mm drop; ideal for heel?strikers seeking impact reduction and control
- X10 carbon rubber in high-wear zones: tough, long-lasting traction on pavement
- Rugged outsole coverage: protects midsole and supports torsional stability
- Jacquard mesh upper with gusseted tongue: breathable and secure, with recycled materials throughout lining, sockliner, and laces
- Slightly wider fit in midfoot and toe-box—welcoming for broader feet
- Weight: 295g. Drop: 12–12.9?mm (high-offset heel design). Stack Heights: Heel 38–38.0?mm / Forefoot 25.1–26?mm. Stability category: Propulsive stability with partial Wave Plate and wide base—ideal for heel-strikers needing non-obtrusive support