Nexx · X.404
Nexx X.404 Silver
Quick Facts at a Glance
Verified Safety Snapshot
How this helmet’s verified certifications map to recognized safety homologations and crash testing.
Safety standards compliance is based on official manufacturer documentation and public safety laboratory test results. Always verify regional compliance labels on the physical helmet prior to use.
Verified Fit & Sizing Guide
Head shape profile matching and interactive size calculator based on verified manufacturer dimensions.
Open face design offers maximum ventilation; suitable for sport and urban commuting; requires separate chin guard attachment.
How to measure
Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, and repeat for consistency.
Design Concept & Background
"Safety First"
Command the road with the Nexx X.404 Silver, a masterpiece of Italian design that merges vintage-inspired aesthetics with modern safety engineering. This open-face helmet features a sleek, silver finish accented by bold graphics, offering a timeless look that turns heads without compromising on protection. Constructed from high-impact ABS composite, it delivers superior durability while the multi-layer EPS liner ensures unmatched comfort during long rides. The advanced ventilation system channels cool air directly to your face and neck, keeping you refreshed even in summer heat. With its lightweight build and secure fit, the X.404 is the perfect choice for urban commuters and weekend cruisers alike who demand style, performance, and peace of mind in every ride.
Rider Profile & Intended Use
購入先
| 販売店 | 価格 | Availability | |
|---|---|---|---|
| Amazon (US) | 現在の価格を確認 | サイトで見る | 価格を確認 → |
価格履歴とトレンド
ℹ️ Helmetsanは、独立したオートバイの安全性・意思決定エンジンです。価格を確認したり、小売店のリンク経由で購入したりすると、追加費用なしでHelmetsanがアフィリエイト報酬を受け取る場合があります。
Product Concept & Specifications
Nexx (Portugal)Engineering & Biomechanical Safety Analysis
The Nexx X.404 utilizes a multi-density EPS liner system engineered to absorb high-impact energy while maintaining structural rigidity in the chin bar. Its aerodynamic shell features wind-tunnel-optimized contours that manage airflow separation, significantly reducing buffeting at highway speeds despite its open-face configuration.
The Nexx X.404 Silver is engineered as a high-integrity Open Face protective system, utilizing a structural shell constructed from Composite. This structural layup is engineered to provide progressive kinetic energy dissipation during impact deceleration, distributing localized shock across outer lamina layers while minimizing deformation transfer into the internal multi-density EPS liner.
Certified to ECE 22.05 protocols, the architecture is subjected to rigorous linear deceleration limits and oblique impact evaluations to mitigate rotational acceleration forces associated with diffuse axonal injury. For a deeper breakdown of rotational thresholds and impact testing speeds, consult our ECE 22.06 vs DOT vs SNELL engineering benchmark.
Internal geometry follows a Intermediate Oval cranial profile, designed to mitigate focal pressure hot spots across the parietal ridges while maintaining uniform radial clamping pressure along the zygomatic arch. Riders seeking optimal retention stability and break-in guidance should review the cranial aspect ratios and head shape guide as well as our 3D cheek pad density protocol.
Shell composite integrity and acoustic sealing are further optimized through channelized EPS porting and aerodynamic laminar profiling. To learn how shell composites resist stress cracking under prolonged environmental cycling, inspect the composite material comparative matrix.
Fit & Shell Structure
Intermediate Oval Shape
Balanced oval fit: standard ergonomic curvature fitting 80%+ of riders.
Safety & Certifications
Acoustics & Aerodynamics
Technology & Convenience
Interactive Size & Fit Finder
Open face design offers maximum ventilation; suitable for sport and urban commuting; requires separate chin guard attachment.
How to measure
Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, and repeat for consistency.
View on retailers
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Compatible Motorcycles for the Nexx X.404 Silver
Acoustically insulated for laminar highway airflow, drop-down sun visor utility, and reduced neck strain.
Data Confidence & Verification Provenance
Helmetsan enforces field-level verification and multi-source cross-referencing. Unverified values are explicitly flagged rather than estimated.