I think it's kind of the same thing as wearing flip flops in the winter. Which I have to admit I do it all the time!! It's like when it's nice out but not super hot you can wear your scarf to keep you warm in the air conditioning. It's great to have and just throw in your purse in case you need it!
LOL I'm one of those who wear flip flops in the winter too! I loathe wearing socks even though I get cold easily!
Great advice all around.. my office is an ice box in the summertime and I wear most of my cardigans in the summer! If you're like me and get cold very easily with the slightest wind or temperature drop then this is a great piece to have!