White coat

When performing a lab coat or lab coat is a protective clothing for work within a laboratory or facility, working in what chemicals. The Duden called him a " smock for someone who works in a laboratory ."

It serves to protect the clothing and / or skin from hazardous substances. A lab coat is usually made of white cotton. It is available but also in other colors. Usually we mean by a lab coat a knee-length coat, which you can close with buttons.