Sizes & Weight Size Guides
Small Shell 1500 gr Large Shell 1500 gr


Protección ECE

“ECE” approved protection

Protección DOT

DOT approved protection


Two External shell sizes

Almohadillas Extraibles y Lavables

All MT HELMETS helmet pads are easily removable for cleaning with warm water and neutral soap. The pads are antiallergic and antibacterial.

Entradas de aire

To have effective ventilation, it is imperative that the air actually enters the hull. MT HELMETS uses high-tech air permeable fabrics inside the high-end helmet.

Extracción de aire

To have good ventilation one of the most important features is the extraction of air in the back of the helmets. The extractor facilitates the creation of an air flow through the hull so that heat can be evacuated from inside it.

Interior ignífugo

The materials used for the interiors of MT HELMETS helmets are made with flame retardant fibers to ensure optimum safety.

Múltiples tejidos internosWe have a diversity of fabrics for the interiors of the helmets.


Quick activation of ventilation

This system has the advantage that it is very easy to use, with or without gloves. The result of this ease of use is that the driver does not have to look for a small lever in the helmet and therefore minimizes the time that the driver must release the handlebar to operate the air control, which increases safety.

Shell Absorption of impacts

Internal shell of high impact absorption.

Internal polystyrene

Multiple density internal polystyrene

Anti-scratch screen in optical polycarbonate

The flexibility and resistance of polycarbonate guarantees optimum safety and the optical factor allows higher levels of light transmission. The anti-fog treatment ensures a clean and safe vision.

Optimal closing screen

Airtight screen that prevents the entry of air and ensures perfect driving.

Easily detachable screen

Easy screen disassembly system

100% Vision

Maximum vision system


FogOff anti-fog sheet

MT-QVSS | Quick Visor Swap System
A system designed in-house by the MT Helmets engineering team and that first comes to market with the Thunder 4 SV, the first helmet to feature this technology. This system, which has been patented by MT Helmets, allows the rider to attach/detach the visor really quickly and comfortably without having to take the helmet off.

ECE 22.06 Approved
This helmet exceeds the highest safety standards and has passed, since its launch, the new ECE 22.06 test, required for going to the European market.

MT Helmets has reinterpreted its designs taking into account the principles of environmental awareness. To reduce the impact on the environment, it has been sought to increase the helmet lifetime with detachable elements which can be easily replaced if necessary, either because they are broken or need to be renewed.

MT-MDH | Micrometric Double Hook
Redesigned micrometric retention system to keep it always fastened and secured. The MT Helmets engineering department has developed this system to ensure that the fastener is locked by at least two points, ensuring that the system is secured. This locking system, optimal for sport-touring models, offers the best balance between wearing comfort and safety.

What the box contains

1 Thunder 4 SV
Protective bag
Protective foam with helmet support function.
User manual
MT Helmets sticker



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