1. Color: Red.
2. Consists of three layers: shell, foam cushioning layer, and comfort liner; drainage and ventilation holes ≥6.
3. The helmet adopts a perforated design, providing breathability, weight reduction, and drainage functions, protecting ears and occipital bone;
4. Can still float on the water surface after immersion in water for ≥48h;
5. Top impact acceleration performance: Maximum acceleration ≥500gn, duration of acceleration exceeding 150gn ≤2ms;
6. Chin strap tensile strength: Chin strap does not break or slip, elongation ≥10mm; Helmet lateral rigidity: Maximum deformation of shell ≥20mm, residual deformation after unloading ≤10mm;
7. Weight ≤620g
8. Impact absorption performance: Maximum force on headform during impact ≥32000N;
