There are no pressure points front or rear and it doesn't move down the forehead in the cycling position when the neck is low but the head looks up. I’ve read frequently that Giro helmets suit round heads better, but ever since my first Giro – the Pneumo of the early 2000s – I’ve found Giro helmets fit my more oval head very well and that includes the Helios. Spherical MIPS feels like a welcome return to wearing a normal helmet after the original plastic sheet-type MIPS system.Īs for fit, it’s obviously best in non-pandemic times to try on helmets and find out which ones suit your head shape.
I found the Helios fitted so well anyway that the closure system was a mere formality. So why does it cost less? According to Giro, cooling is two per cent less efficient since the Aether has bigger (but fewer) channels – 11 compared to the Helios’s 15 – but for UK riding who’s going to notice that? And the Helios uses the Roc Loc 5 Air closure system rather than the Roc Loc 5+ Air and again, the difference is so minimal that you’ll probably struggle to tell the difference. The Helios is very slightly lighter than more expensive the Aether – 260g v 269g in medium – and according to Giro it also tested faster in the wind tunnel. The idea of MIPS, whether Spherical or in its original format, is to add protection against rotational forces transferred to the brain in an angled impact.
