Bought these for bike commuting in the DC area. They're definitely light. I wore them today in 42* and my hands were cool. Not uncomfortably cold. But noticeably cool. I don't think I'd wear them in temps below 40*.

The wrist "collar" on the gloves also doesn't go very far up your arm, so, when cycling, it allows cold air to enter your jacket sleeve. Worth noting is that they have no padding whatsoever on the palm/fingers. The gray parts are grippy silicone(?) rubber, which grabs the handlebars and brake levers well.

Finally, they fit pretty large. I bought XXL (being 6'6" and 270 lbs, most days) and they were loose fitting on my hands. Overall, the gloves have a nice feel (as I've come to expect from Pearl Isumi stuff), but I'm not sure if I'm sold on them yet.