I was initially sceptical (for my use) of these knee warmers as they seemed far too thick. I tried them one morning when the temperature was in the low 50s (F) and found them quite comfortable, far more so than previous lycra-only knee warmers. During the last half of the ride, the temperature had risen to the upper 60's and the Kneekers were still comfortable. I think one reason for this is that they dry while using. I'm quite sure I would find these comfortable in temperatures down to the low 30's.

The Kneekers also remain in place (tucked under the leg of my cycling shorts). I'm 6' 2" in height and the one-size fits all is sufficient in length for me.