When we were in our booth at Stitches and I was knitting away while wearing my armwarmers, a lot of people asked me why would anyone want to wear elbow-length cashmere armwarmers? As in, if it's cold enough that your arms and hand need covering, won't your fingers be cold?
I explained that they're the perfect fall accessory, and that I like being able to knit without having to take them off. Since I am always getting on and off the bus and subway, it's nice to be able to keep them on instead of having to keep taking them off, putting them back on and making sure you have both.
But when it's really cold, they don't cut it. You need gloves.
And when it's really cold, and the wind whips right up your coat sleeve past your gloves?
I put the armwarmers on OVER my leather gloves. Nice and toasty and no stray blasts of wind up my sleeves.
I told you these were absolutely practical elbow-length cashmere armwarmers.
ETA: Koigu Cashmere armwarmers project info. (that's what I get for assuming)