If you are a resident of Second Life®, and you visit my island, Livingtree, you'll find that it's covered and snow and ice.
Keep your virtual self warm. Put on a little sweater! Like the ones I just made, based on the knit design used for this year's Holiday Bear, but sized to fit men and women, boys and girls!
The sweater has a sculpted turtleneck collar, included in 3 sizes for your convenience. (It's mod though, and a single prim, so it's very easy to adjust to your own avatar.) There's a Shirt, which makes a very thick, warm sweater, and a skirt that goes with it so that it doesn't look tucked in. Or you can wear the Jacket instead, with or without the shirt, for a sleeker look.
Available in six different colors; Black, Blue, Green, Gold, Red and White. Copy/Mod/NO Transfer (but there's a Gift button on the vendor if you want to give it to someone else.) L$100, everywhere that R(S)W clothing is sold.