Nexx · X.404 · 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
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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
Where to buy
Price History & Trends
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Product Concept & Specifications
Nexx (Portugal)Engineering & Technical 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.
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.
Available Colors & Graphics
View on retailers
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Data Confidence & Verification Provenance
Helmetsan enforces field-level verification and multi-source cross-referencing. Unverified values are explicitly flagged rather than estimated.