RST D3O Viper Air CE Level 2 Back Protector review: Lightweight and breathable back protector with CE level 2 protection compatible with some RST jackets. This guide considers the listed features and the checks to make before buying.

This is a specification-based buying guide, not a hands-on road test. We may earn a commission from purchases through our links, at no extra cost to you.
Key features of RST D3O Viper Air CE Level 2 Back Protector
Sportsbikeshop lists the following details for the checked version:
- Lightweight and breathable construction
- CE level 2 protection
- Offering 3.5x greater breathability
- 20% less contact with the rider's back for maximum comfort
- Greater flexibility thanks to new wave geometry and material formulation
- Dimensions: 260mm x 398mm
Protection and construction
The protector is listed as CE Level 2. This is a rating for the protector, not a new certification for the rest of the riding kit.
Compatibility and positioning
Compare the protector’s size and outline with the intended garment or fitting system. A matching brand name alone does not establish compatibility. Check the position when wearing the complete riding kit and moving into your riding posture. The protector’s own rating should not be confused with certification of an entire garment.
See our motorcycle body armour reviews for more buying guides.
Related reading: RST Contour Plus CE Level 1 Back Protector Review.