I get several recurring questions about fatbike riding:
"Do you get cold?"
"What do you think about?"
"What do you eat?"
"What do you wear?"
The questions interlock: I do get cold, sure, but not usually that cold, in part because I spend a lot of time thinking about whether I’m cold or hot and adjusting accordingly. I also spend a lot of time thinking about eating and drinking, and of course actually eating and drinking. And when I get everything just right, I don’t have to think about being cold or hot because I’ve chosen the right clothes, and can think about the race itself, about conditions on the trail, about the state of my body and mind, about other racers, et cetera ad infinitum.
I’ve already thought a lot about the race-day weather. Conditions at this year’s Arrowhead look to be similar to last year’s – around 20°F – though we might get a little snow this time. Given this straightforward situation, I’m going with a very reliable set of clothes that I’ve used in other races and long rides, stuff that keeps me warm and, as important, dry but that is also comfortable and easy to adjust as needed. After I put this clothing on around 6 on Monday morning, I hope I don’t have to think about it again till I’m done!
Layers are key from top to bottom, because they help manage moisture – preventing excessive sweating that could lead to dehydration or, worse, frostbite. In pursuing layering nirvana, I have not chosen much cycling-specific clothing. In fact, only the boots are something I couldn’t wear for any other outdoor winter activity.
The boots are 45NRTH’s Wolvhammer cycling boots – sturdy, warm shitkickers that clip into my pedals. Inside, I wear compression socks inside thin wool socks. (If I expected colder temps I’d wear thicker outer socks.)
On my legs, I wear thermal windbriefs, fairly lightweight Craft baselayer bottoms (super long so they stay tucked into my socks), and an old but wonderful pair of fleece-lined Craft skiing tights. I’ve never had cold legs, so I know this combination works.
On my trunk, I often wear a thin wicking undershirt under a long-sleeved but lightweight Craft baselayer shirt (the match to the longjohns). I may forego the undershirt this year as it’s too effective an insulator for 20° weather. I wear fairly thin fleece gloves, as I usually have my hands buried in the big overmitts called "pogies" that are fixed to my handlebars. I carry several pairs of gloves to have options if one pair gets sweaty or if the temperature fluctuates. (At the halfway checkpoint this year, I plan to change into a completely fresh set of baselayer items: both pairs of socks, windbriefs, long bottoms and top.)
My outer layer is a soft shell jacket by Eddie Bauer’s "First Ascent" line. It’s a fantastic piece of clothing: close fitting but very stretchy, with two deep side pockets and a deep chest pocket, a full zipper, and a huge hood that, pulled up, protects the neck and even my lower face. I also wear a very lightweight reflective vest, to comply with race rules that mandate a certain amount of reflective material – the better for other racers and especially snowmobilers to see you.
Keeping my head warm but not sweaty is a challenge. I usually carry two or three different hats so that I can change out of a sweaty one or into a warmer one. The jacket’s hood is a secret weapon here. I always wear some sort of eye protection – usually clear-lensed cycling glasses, though I carry regular cycling sunglasses too, because even an overcast day can be damn bright on the snow. I wear a headlamp all night so that I can see and be seen, but also in the hours before and after dark when I need to be seen in tricky flat light. Fatbike races typically don’t require racers to wear helmets, so I forego that too, which makes regulating my head temperature a lot easier.
Though all this stuff is expensive, it’s all very effective at keeping me warm and dry and therefore safe. And I’m inordinately proud of the fact that I didn’t pay full retail for a single one of these items, except the boots, which I bought with a bonus a couple years ago.