Giro
Giro Aries Spherical
$349.95
Best Bike Helmets · head-to-head
Giro Aries Spherical vs Kask Protone Icon
A sourced, side-by-side comparison. Kask Protone Icon is cheaper at $300. Every spec and price links to its source.
Kask
Kask Protone Icon
$300Cheaper
Which is better: the Giro Aries Spherical or Kask Protone Icon?
On the specs we track, they're closely matched. The Kask Protone Icon is the cheaper at $300.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Giro Aries Spherical | Kask Protone Icon |
|---|---|---|
| US price | $349.95 | $300 |
| Brand | Giro | Kask |
| Released | — | — |
| Weight grams | 270 | — |
| Rotational protection | MIPS Spherical | none |
| Shell construction | in-mold | — |
| Vent count | 24 | — |
| Intended use | road | road |
| Size range (cm) | 51-63 | 50-62 |
| Certification | EN 1078 | CPSC |
| Visor included | No | No |
| Integrated light | No | No |
| Reflective detailing | Yes | Yes |
Sources — Giro Aries Spherical: giro.com (verified 2026-07-13). Kask Protone Icon: kask.com (verified 2026-07-13).
What's the difference between the Giro Aries Spherical and Kask Protone Icon?
Where the two actually differ on the specs we track (3 of 10). Matching specs are omitted.
- Rotational protection: Giro Aries Spherical MIPS Spherical vs Kask Protone Icon none
- Size range (cm): Giro Aries Spherical 51-63 vs Kask Protone Icon 50-62
- Certification: Giro Aries Spherical EN 1078 vs Kask Protone Icon CPSC