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The ultra-plush Arai interior is still there (thank you!) while the excellent ventilation system has been improved even more
Helmet certification labels can be confusing
The Proton's design is more compact, so it has a slightly smaller footprint, making the Proton an easier fit in your flat, shed, or living room
If youre looking for a more pedal-friendly, enduro-style full face, consider the Smith Mainline instead
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