Alpinestars A-4 Plasma Roost Guard M/L

Description

A-4 Plasma Roost Guard

Anatomically profiled for all forms of off-road riding

Features a semi-rigid thermoplastic polyhedron design chest protector and a Nucleon Plasma back protector that are engineered to be lightweight, breathable, comfortable, adaptive, and protective

Key Features

Highly flexible Nucleon Plasma Back Protector constructed from viscoelastic material engineered from biobased polymers and formed into a structure that is pliable in all directions while maintaining the ability to dissipate impact energies

Lightweight and highly ventilated, this protector offers strong impact force dispersion and absorption while ensuring maximum coverage areas in all riding positions

Lightweight and ultra-vented chest armor

The chest outer shells design achieves the desired structural strength and imposed load performance when compared to flat or unfaceted surfaces

The over-injected flexible side wings of the chest protector follows the body’s contours for 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 to use the A-4 Chest without the back protector

Features highly perforated, adjustable, and detachable rib and shoulder padding for additional rib and shoulder coverage against roost and impact

Construction

Equipped with adjustable shoulder and side straps for an optimized performance fit

Removable soft tactile thermoformed shoulder padding for enhanced rider comfort

The lining on the back protector offers a soft tactile feeling against the skin while maintaining the integral structure of the protectors and reducing the risk of any material tearing

The lining is ribbed for superior airflow while also reducing the amount of material that is in contact with the skin

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

Bionic Neck Support compatibility via the BNS shoulder pull tabs

USDA certified bio-based eco-friendly and sustainable impact absorbing material

Back protector: EN 1621-2:2014 Level 1

Chest protector: EN 1621-3:2018 Level 1

40% Polyurethane, 25% Ethylene-Vinyl Acetate, 12% Thermoplastic Elastomer, 11% Polypropylene, 10% Polyester & 2% Other

Alpinestars is a globally recognised Italian manufacturer of high-performance protective apparel and equipment for motorsports and action sports. Founded in 1963 by Sante Mazzarolo, the company has grown from making motocross boots into one of the world’s most respected brands in racing safety gear

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