Quote Originally Posted by indigoiis View Post
It's supposed to be 45 and rainy on Sunday during the half. Any suggestions for what to wear? I was planning on my capris, which are very comfortable, and my wicking t-shirt. But I am wondering if my arms will get cold. If I bring my little windbreaker, I just know that thing will be coming off by mile five, and I don't want to have it around my waist, encumbering my fuel belt. Sigh. I thought all this "what to wear" stuff was exclusive to work and nights out... but apparently not. LOL.
At about 40, I start to wear my CW-X insulated sport support top - it's basically a full-length racerback sports bra that goes down to my hips and has a fleece liner. I will wear long sleeves on colder/wetter/windier days. 45-50 and I switch to short sleeves. Sometimes between 40-45 I'll wear the insulated top and short sleeves (the insulated top keeps my core so warm).

I really like my CW-X capri-length tights - though I have yet to put them on this year, I've just been wearing longer tri shorts. The capris are a good inbetween.

After I acclimate to the temperature, I can hold steady at this configuration to about 30 degrees, then I have to add on a better top layer and sometimes a hat, and switch to my CW-X insulator tights. Down around 20 degrees, a hat is a must, and my toes start to get really cold in just one pair of socks. Again, once I acclimate, it's not as bad.

For many races, marathons, halfs, Ironman, whatever, I wear arm warmers so I don't have to choose between long and short sleeves when conditions might change. If I get too warm, I rip them off and tie them to my race belt (or hand them to a family member if I'm sure I won't need them again). At 40-45 degrees, I might just wear short sleeves and the arm warmers - if it's a sunny day, I could survive in the short sleeves. Though, if you have a good wicking long-sleeve shirt (like the wool suggestion), I think you'd be fine in long sleeves. Cold rain is kind of penetrating, so I'd dress a little warmer if it's definitely going to be rainy - wool might be perfect.