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Alpinestars A-4 Plasma Chest Protector, Motorcycle Body Armor, White with Black and Red Accents, Ventilated Hard Shell Design, Adjustable Side Straps, Lightweight Off-Road Protection
5.0 | 2 reviews

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A-4 Plasma Chest Protector

motocross | body protectors

€169,95
Color:Black Red White

Size:

Size guide
Earn 170 points with Alpinestars Membership
Description

Built for motocross and off-road riding, the A-4 Plasma Chest Protector provides lightweight chest and back impact protection, with ventilated construction and an adaptive Nucleon PLASMA back protector supporting airflow and freedom of movement on the bike.

Key Features

• Advanced Construction: The Nucleon PLASMA element in this protector is constructed from a bio-based viscoelastic impact-absorbing compound, with no less than 25% bio-based content and molded into a precision-engineered geometry. While the PLASMA material dissipates impact energy and significantly reduces transmitted forces through controlled material response, the low-profile PLASMA geometry is specifically developed to compress and extend with movement while supporting airflow through its channeled and highly-perforated design.
• Exceptional Comfort and Flexibility: The geometry of the protector is pliable in all directions and compresses and extends with movement, molding to the body for a close, adaptive fit.
• Lightweight and Ultra-Ventilated Chest Armor: The chest outer shell’s design is based on geodesic polyhedrons, and like a geodesic dome, less material is needed to achieve the desired structural strength and imposed load performance when compared to flat or unfaceted surfaces. This results in a protector where the whole is greater than the sum of all its parts, making the new A-4 PLASMA Chest Protector supremely lightweight and ventilated.
• Premium Comfort: The over-injected flexible side wings of the chest protector perfectly follow the body’s contours for superior comfort and freedom of movement.
• Optional Race kit: Engineered to be compatible with the Nucleon PLASMA Extended Roost Coverage kit which includes Upper and Lower Chest Extensions and an additional Y-Strap System, allowing riders to use the A-4 Chest Protector without the back protector.
• Rib and Shoulder Coverage: The A-4 PLASMA Chest Protector features highly perforated, adjustable, and detachable rib and shoulder padding for additional coverage against roost and impact.
• BNS compatible via the elasticated BNS pull tabs situated on the removable soft tactile thermoformed shoulder pads.

Protection

Nucleon PLASMA Back Protector (EN 1621-2:2014) - CE Level 1
Semi-Rigid Thermoplastic Polyhedron Chest Protector (EN 1621-3:2018) - CE Level 1
Highly Perforated, Adjustable and Detachable Rib and Shoulder Padding

Construction

Adjustable shoulder and side straps
Adjustable shoulder and side straps provide an optimized performance fit.

Removable thermoformed shoulder padding
Removable thermoformed shoulder padding has a soft tactile feel for enhanced rider comfort.

Ribbed back protector lining
The back protector lining provides a soft tactile feel against the skin while maintaining the structural integrity of the protectors and reducing the risk of material tearing. Its ribbed construction provides superior airflow while reducing the amount of material in contact with the skin.

Perforated 3D mesh chassis
The perforated 3D mesh chassis offers additional protection against tire roost.

BNS shoulder pull tabs
The BNS shoulder pull tabs provide Bionic Neck Support compatibility.

SKU 8059347564814 EAN 6500526-132-ML
Alpinestars Nucleon Plasma protector, Black and Red impact armor for MTB and motorcycle with a wavy textured surface.
Alpinestars Nucleon Plasma Protector Insert, Red Honeycomb MTB Armor, Breathable CE Certified Protection for Mountain Biking.

Protection

Innovative impact absorbing protection that is elastic, forgiving, and moves with the natural movement of the body

Alpinestars Nucleon Plasma Protector, Red Perforated Flexible Armor for MTB Impact Protection and Breathability.

Breathability

The innovative structural design allows the protector to be slim and to have a high level of breathability, as well as flexibility, due to the high percentage of perforation attributed to the "M" shaped design.

Alpinestars Nucleon Plasma Protection, Black and Red Honeycomb MTB Impact Armor, Breathable Technical Material

Comfort

The inner side of certain protectors are laminated with a smooth fabric which provides a soft and comfortable feeling. The fabric adds durability and prevents possible tearing of the viscoelastic material.

Alpinestars Nucleon Plasma MTB protection, red and black flexible impact-absorbing armor for mountain biking performance.

Adaptive

The compound, combined with the 3D engineered structure, provides a very flexible and adaptive platform. The "M-shaped" structural design maximizes the area of protection while at the same time provides superior adaptivity.

Alpinestars Nucleon Plasma Protector, MTB High-Performance Impact Absorption, Red, Zig-Zag Structure Detail.

Impact Performance

The combination of this structure and material results in a protector that is equally protective at any given point of the structure, while at the same time, is also flexible in any direction.

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Frequently asked questions Hide FAQs
Is the A-4 Plasma Chest Protector CE-certified?

Yes, this chest protector meets CE certification standards for impact protection. The semi-rigid thermoplastic polyhedron chest plate and Nucleon PLASMA back protector are engineered to provide certified protection for off-road and motocross riding.

Does this chest protector include back protection?

Yes, the A-4 PLASMA includes integrated Nucleon PLASMA back protection. This provides comprehensive front and back coverage in a single, anatomically profiled unit designed specifically for off-road riding.

How does the A-4 Plasma fit under a jersey or jacket?

The A-4 PLASMA features an anatomically profiled, low-profile design that fits comfortably under motocross jerseys and off-road jackets. The lightweight construction and breathable materials ensure it doesn't add excessive bulk while maintaining full protection coverage.

Can this chest protector be worn for all types of off-road riding?

Yes, the A-4 PLASMA is engineered for all forms of off-road riding including motocross, enduro, trail riding, and off-road adventure. Its adaptive design and comprehensive protection make it suitable across different off-road disciplines and riding intensities.

Is the A-4 Plasma Chest Protector breathable for hot weather riding?

Yes, the A-4 PLASMA is specifically designed with breathability in mind. The thermoplastic polyhedron structure and Nucleon PLASMA back protector allow airflow while maintaining protection, making it suitable for warm weather off-road riding conditions.