reggiegasket – Member
not genuinely breathable, not if you are working hard.
Is anything?
No fabric is going to stop you sweating or getting warm. The trouble with mountain biking is you go anaerobic repeatedly which kicks your body temperature through the roof, ime road riding is a bit more steady, which means it’s demanding on clothing, but breathability or whatever you want to call MVT (Moisture Vapour Transfer) isn’t an absolute, it’s a sliding scale, so talking about ‘genuine breathability’ is a bit misleading.
The stuff I’ve used that I’d say is at the top end of the breathability scale is Gore-Tex Active Shell, eVent and NeoShell plus Paramo in colder conditions. Windstopper fabric is effectively waterproof too and slightly more breathable again compared to most fully waterproof fabrics, but not taped, so lets water in at the seams in heavy rain, eventually.
Also, everyone works differently, some folk run hot, some don’t. For me Paramo is a freezing and below fabric even with venting, but some people run cool and ride steady and can use it happily in milder conditions. And if you run really hot, nothing will cope though a more breathable fabric will allow you to dry out faster when you do stop.
I’ve seen Paramo stuff visibly steaming at low temperatures on winter night rides. Ditto eVent. So how’s that not ‘genuinely breathable’? 😉