I love my Machingers and can't quilt without them now. They stay cool. I have several pairs...one at my machine, one in my travel bag and one to be washed. I find they lessen the fatigue in my back, arms and shoulders when pushing and pulling a quilt through FM or SID quilting. If you try them once or twice and don't feel comfortable, please don't give up on them. Like anything else, it takes a little practice to get used to them, but once you do you'll never want to be without them.