How many people do you have first hand experience with this working on? Sounds a little bit like bullshitski to me. There's no insulation on the toes of my foam liners. I don't care what you do to your veins it's not going to matter. Also, you have one shot to get this right, one. My heated socks work in my ski boots, snowboard HB's, softboots, moto boots... etc.