I dunno what they're actually called. But I don't like them. Around here they're referred to as "monkey suits", basically a one-use plastic smock with an open back panel and thumb loops. Doesn't matter if I'm sweaty or shiverring when I put one on, it only takes a couple of minutes before it is stuck to me with sweat. Yes, I know that it is to protect me from the stuff I work with, but that doesn't mean that it is pleasant to have sweat dripping down your arms and pooling in your gloves.