| Brand | 李寧 |
| Model | 赤兔 9 Ultra |
| Year | 2025 |
| Gender Version | Unisex |
| Category | Daily Training 5-10km Short Run Tempo Run Half Marathon Speed Training Long Distance Training |
| Terrain | Asphalt |
| Midsole Technology | BOOM supercritical foaming technology |
| Carbon Plate Structure | Full-length carbon fiber plate |
| Upper Material | BOOM silk upper (lightweight breathable) |
| Outsole Configuration | GCU耐磨 rubber outsole |
| Forefoot Thickness | 30.0mm |
| Heel Thickness | 40.0mm |
| Drop | 10mm |
| Weight | 220g |
| Fit | Snug |
| Breathability | (3/5) |
| Stability | Low |
| Cushion Distribution | Even |
| Feel Attribute | Firm bounce, strong propulsion |
| Bounce | (3/5) |
| Running Style Recommendation | Neutral |
| Runner Level | Casual Runner |
| Weight Range | Light |
| Width | Standard |
| Arch Type | Medium |
| Landing Type | Midfoot |
| Price | $156.00 USD (approx.) | Durability | 600 km |
Balanced all-around training shoe. BOOM midsole technology delivers excellent bounce and cushioning. Suitable for daily multi-pace training.
