muck boots are rubber boots, but some have a bit of insulation in them. mine do and I can wear them without socks in the warmer months, they don't breathe, because they are rubber... but my feet don't freeze in them unless they were already cold when I slip the boots on... I think mine were just under $100...much better to wear those than getting a thick layer of litter and poop on my work boots... it peels right off the mucks...