First... all of your running gear should be 'technical' clothes so that it wicks away moisture
instead of holding is next to your skin making you cold and clammy. With that in mind... here's how
I dress... (as you will see... it's all about layering)
+10C and up -- Shorts & T-shirt
+10C to +5C -- Shorts and a lightweight long sleeve shirt
+5C to -5C -- Loose fitting technical running pants over wind breifs, winter weight long sleeve,
running 'shell' jacket, running gloves (optional), summer running cap
-5C to -10C -- Mid-zero running tights over wind breifs, winter weight long sleeve, running 'shell'
jacket, running mitts (warmer than gloves), winter running cap
-10C to -15C -- Mid-zero running tights over wind breifs, winter weight long sleeve, running
'shell' jacket, running mitts, winter running cap, neck gaitor or, if it's really windy, 'the
masque' face mask.
-15C to -20C -- Loose fitting technical running pants over tights over wind breifs, winter weight
long sleeve, running 'shell' jacket, running mitts over running gloves, touque, 'the masque'. You
might also add a thin, skin tight layer under your shirt or a flecce over your shirt
(i.e. a third torso layer).
Below -20C... I have gone out... but would probably recommend just staying in... unless it's dead
calm without any wind... at this temp, my eyes tear up and start freezing my eyelashes
together... some small snowboarding goggles would prevent that... but I'm not that desperate to
run when it's -25C 🙂
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Nova Scotia, Canada