When the sun is shinning, dressing for a run doesn’t require much deliberation. You just chuck on a sports bra, a pair of running shorts and a t-shirt… and away you go. But as soon as the temperature plummets, you need to start pulling together a different kit, including base layers for running, running jackets, hats and gloves. All without overdressing. (Because if you’re already warm when you start running, you’ll be sweating like crazy before long – and no one wants that).
Your winter running kit needs to keep you warm (but not too warm). And the first line of defence against the winter chill are base layers made of technical fabrics.
What is a base layer for running?
A base layer is essentially a long-sleeve running top that, on a cool day, can be worn as your only layer. The colder it gets = the more layers you need.
Thinner base layers are great to wear with lighter insulation options, such as running gilets or lightweight jackets. But when the temperature drops to below freezing you might want to pair a base layer with a more insulated outer-layer or pop on an extra mid-layer underneath a shell jacket.
One thing to keep in mind though – factor in the intensity of your exercise when choosing your layers. If you’re heading out on a tempo run, or speed session at the track, you’ll want to opt for lighter layering.
What material should a base layer be?
A base layers’ main role is to wick sweat away from your skin to help your body maintain its regular temperature, so you want something that’s made from technical fibres to keep you comfortable.
It’s generally recommended to wear fewer layers, made from synthetic materials and to stay away from cotton as it absorbs and holds moisture. Merino wool is also a popular natural fabric, and surprisingly effective at keeping you warm, even when you sweat.
Should base layers be tight or loose?
Ideally, base layers can to worn under a mid-layer or a jacket, so you want it to be close-fitting and sit snug against your skin to retrain heat.
What is the best base layer for running?
We love Lululemon’s Swiftly Tech 2.0 Long Sleeve – which is one of their hero run products – it’s really the ultimate layering piece for transitional weather. The thumbholes provide that little bit of extra coverage, while the lightweight, sweat-wicking mesh fabric promises to keep you at the right temperature.
For those who prefer the performance benefits of merino wool, you can’t go wrong with Tracksmith’s Brighton Base Layer – which stays warm even when wet.