10 Best Alpinestar Chest Protector Review Guide

Updated May 2022

1

Alpinestars Nucleon Flex Pro Ci Replacement Armor

The Nucleon Flex Pro Ci features an easy-to-use, unisex, divided CE-certified Level 2 chest protector. Highly ventilated and very lightweight, the ergo-nomically designed protectors are excellent for everyday riding.

Features:

  • Nucleon Flex Pro Technology
  • High performance, super lightweight track and race chest protector
  • Constructed from a high performance polymeric material blend
  • Optimized flexibility and excellent weight saving properties
  • Structure provides the perfect balance between force dispersion and energy absorption 
  • Designed for advanced energy absorption, adaptivity, maximum breathability and air flow
  • Ergonomic protection plate contours to the natural curve of the body
  • Optimum fit for men and women

Sizing:

XS-SM fits XS, SM, 42-50 Alpinestars jackets
MD-XL fits MD-4XL, 50-64 Alpinestars jackets

2

Alpinestars Bionic Action Chest Protector

The Alpinestars Bionic Action Chest Protector is an ultra lightweight protection system with superior upper body protection against impacts. Cell Technology cover chest and back protectors to provide optimum ventilation throughout the race. Both front and rear hard shell plates are backed with bio foam to ensure a comfortable snug fit. Quick and easy to put on with no arm obstruction.

Features:

  • All-new triple layer chest protector features a highly perforated impact absorption insert for high levels of protection
  • Extended padding to offer more protection against tire roost without obstructing arm movement
  • The protector plastic shells are perforated for maximum breathability and cooling ventilation
  • Elastic closure system features newly designed, quick and easy buckles that fit a broad range of rider body sizes
  • Thermoformed padded chassis for optimized levels of comfort and close fit
  • Adjustable shoulder straps for optimal fit
  • Back Protector: En 1621-2:2014 Level 1
  • Chest Protector: En 1621-3:2018 Level 1

3

Alpinestars Bionic Roost Guard

Protect your torso and shoulders with the Alpinestars Bionic Chest Protector. CE Level protection at the back, chest and shoulders team up with perforation zones in the shells with air channeling for breathability and ventilation. The protector plates have embedded grid technology under the shells to absorb and dissipate impact forces. Wear a neck brace? The Bionic Roost Guard is BNS compatible.

Features:

  • Hard shells constructed from a high performance polymeric material blend for flexibility and weight savings
  • Perforation zones in shells with air channeling for breathability and ventilation
  • Protector plates with embedded grid technology under the shells to absorb and dissipate impact forces
  • Back protector CE certified according to the EN 1621-2:2014 Level 1
  • Chest protector CE certified according to the prEN 1621-3:2016 Level 1
  • Shoulder protectors CE certified according to the EN 1621-1:2012 Level 1
  • Removable upper back padded panel for BNS compatibility
  • Soft touch BNS puller for convenient and safe engagement of the BNS
  • Modular design allows various configurations depending on riding situation
  • Soft bio foam padded chassis for maximum comfort and close-to-the-body fit
  • Side adjustable kidney belt
  • Front side wings connected to the main chest protector with 3 bridge fixtures allowing the wings to to move independently
  • Thermoformed side padding protects the lower ribs
  • Adjustable and removable shoulder protectors
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4

Alpinestars Nucleon KR-Ci Chest Protectors

The Nucleon KR-Ci features an easy-to-use divided chest protector insert for men, certified to prEN 1621-3:2013. It is highly ventilating, very lightweight and the ergonomically designed protector is excellent for everyday riding.

Compatible with all Alpinestars jackets and race suits equipped with chest protector pockets (most Alpinestars products). The Nucleon replaces the Bionic Chest Pad and fits any product that the Bionic Chest Pad would have fit.

Features:

  • Sold as a pair
  • CE Level 1

Sizing:

  • XS-SM fits XS, SM, 42-50 Alpinestars jackets
  • MD-XL fits MD-4XL, 50-64 Alpinestars jackets
 
 

5

Alpinestars A-1 Plus Chest Protector

An ultra-lightweight protective system offering excellent upper body protection against impacts and roost, the A-1 protector features front and rear hard shell plates backed with bio-foam padding for a secure and comfortable fit. Quick and easy to put on, the A-1 provides extended padding to protect against roost without obstructing arm movement and is fully compatible with Alpinestars Bionic Neck Supports.

Features:

  • Extended padding to offer more protection against roost without obstructing arm movement
  • Removable shoulder pads and back protector for high levels of customization
  • Stone shield and back protectors are constructed from a high performance polymeric blend for optimized flexibility and excellent weight savings
  • The protector’s plastic shells are perforated for maximum breathability and cooling ventilation
  • Adjustable elastic closure system features quick and easy- to-use buckles that fit a broad range of rider sizes
  • Thermoformed padded chassis for optimized levels of comfort and close-to-body fit
  • Adjustable shoulder straps
  • Bionic Neck Support compatibility
  • Silicon BNS pull tabs for easy and safe engagement of the BNS
  • Integrated Y-strap system for modular use of the back protector with fast and convenient mounting
  • CE-certified back protector
 
 

6

Alpinestars A10 Roost Guard 

Features:

  • Back protector is CE certified according with the EN 1621-2:2014 Level 2
  • Chest protector is CE certified according with the EN 1621-3:2016 Level 2 full chest Type A
  • Shoulder protectors are CE certified according with the EN 1621-1:2012 Level 1 Type A
  • High performance versatile protector for Enduro/Offroad riding
  • Highest level of protection with a modular concept
  • Grid technology cell system: Protector shells are backed with injected cell structures -the perfect combination to dissipate impact energy and absorb impact forces
  • Grid technology cell system enables greater flexibility and air ventilation while significantly reducing weight
  • Hard shells are constructed from a high performance polymeric material blend for optimized flexibility and excellent weight saving properties
  • Shells feature perforation zones and air channeling for excellent breathability and ventilation
  • Easy to remove shoulder and bicep protectors for lighter riding
  • Removable and adjustable shoulder pads for size regulation
  • Removable upper back panel for BNS compatibility
  • Removable upper front panel for BNS compatibility
  • Soft biofoam padded chassis for maximum comfort
  • Soft touch BNS puller for convenient and safe engagement of the BNS
  • Removable EVA padding on biceps with a locking system on the shoulder pad keeps protection in position
  • Soft bio foam padded chassis for maximum comfort and close-to-the-body fit
  • Double adjustable kidney belt system allows personalized, fitment and ensures protection positioning close to the body at all times
  • Features Alpinestars quick release attachment system for convenient in and out
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7

Alpinestars Nucleon KR-C Chest Protector

The Nucleon KR-C features an easy to use chest protector certified to prEN 1621- 3:2013. The innovative harness system allows for fast connection to the Nucleon back protectors KR-1, KR-2 and KR-3. It is highly ventilated, very lightweight, and the ergonomically designed protectors are excellent for touring and sport riding in combination with the KR-1, KR-2 or KR-3.

Features:

  • Compatible with KR-1, KR-2 and KR-3 back protectors
  • CE Level 1

Sizing:

  • XS-SM fits XS, SM, 42-50 Alpinestars jackets
  • MD-XL fits MD-4XL, 50-64 Alpinestars jackets
 
 

8

Alpinestars A-4 Max Chest Protector

The lightweight A-4 Chest Protector offers high levels of CE certified upper body protection and incorporates thermoformed kidney protectors. The A-4 has an innovative strap closure system for a quick and secure fit while the modular design allows the fitting of Alpinestars BNS neck supports for the ultimate in off-road protection.

Features:

  • Shells are perforated for maximum breathability and cooling ventilation, perfect for those hot & dusty days at the track
  • Soft bio-foam padded chassis for optimized levels of comfort and close-to-the-body fit
  • Modular design means the A-4 is optimized for use with Alpinestars BNS neck braces
  • Removable upper back padded panel for BNS neck support compatibility
  • Soft touch BNS puller for easy and safe engagement of the BNS
  • Removable and adjustable shoulder pads for size regulation with integrated BNS puller
  • Additional thermoformed EVA tale extension for extended coverage to the coccyx area
  • Back Protector: EN 1621-2:2014 Level 1
  • Chest Protector: EN 1621-3:2018 Level 1
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9

Alpinestars Nucleon KR-3 Back Protector

Highly flexible and breathable, the Alpinestars Nucleon KR-3 Back Protector is engineered for maximum performance. Using hard shell backed with a soft viscoelastic PU foam compound, the KR3 achieves both max comfort and extraordinary impact absorption. 

Features:

  • 3 waist-to-shoulder dimensions in order to cover all body sizes
  • Lattice-structured back shell plate constructed from a high performance polymeric material blend for optimized flexibility and excellent weight-saving properties
  • Soft viscoelastic PU foam compound
  • Ergonomic design design to absorb high impacts and allow maximum breathability and air flow
  • Nucleon PU foam on the central spine for extraordinary impact absorption performance
  • Convex central hard shell provides highest protection for the spine
  • Horizontal flex grooves for adaptive fit in all riding positions
  • Adjustable rib protector constructed of high performance polymeric material blend for additional side protection
  • Shoulder blade protective padding extensions protect the acromion bone
  • Waist adjustment for customized fit
  • Slim vented kidney belt for added position stability and security
  • Adjustable, detachable elastic shoulder straps
  • Compatible with the Alpinestars Nucleon KR-C Chest Protectors (sold separately)
  • Compatible with the Alpinestars Nucleon KR-TB Protector (sold separately)
  • CE certified to EN 1621-2:2014 Level 2

10

Alpinestars Nucleon KR-Cell CiR Chest Protector

The KR-Cell CiR Chest Protector is Alpinestars’ highest performing impact armor for the chest. The flexible, ventilated design offers race-level performance with new levels of airflow and comfort, benefiting street and track enthusiasts alike. The KR-Cell CiR chest protector can be worn between the rider’s body and any race suit or sport jacket. Or it can be tucked into suits and jackets equipped with pockets for single-piece chest protector units. The KR-Cell CiR meets or exceeds testing standards for CE Level 2 EN 1621-3:2018 certification. 

Features: 

  • Unique CELL microstructure for increased energy absorption, comfort and maximum breathability
  • Ergonomic protection plate contours to the rider’s shape
  • Soft mesh lining on the body side
  • CE Level 2 EN 1621-3:2018 certification

Sizing:

  • Size SM fits jackets and suits: XS, SM and 42-50
  • Size LG fits jackets and suits: MD – 4XL and 50-64