I bought 10 of these at Chemist Warehouse just before the Icicle Ride because I get cold feet (no, I've never left a girl hanging at the Alter) while riding. I've used all of them up now so here's the verdict. Are they as good as I expected?... NO Did they make my feet hot?....NO Did they make my feet warm?...NO Did they make any difference... YES They took that cold damp feeling out of my feet and made cold weather riding much nicer. They only cost me $20. ($1.95 each) Much less than a full Gerbing setup with the batteries and all the wires. I wish they were a degree or two warmer.