Zentai

Zentai (from the Japanese ゼンタイ) is a term for skin-tight garments that cover the entire body. The word is a portmanteau of zenshin taitsu (全身タイツ) ("full-body tights"). Zentai is most commonly made using nylon/spandex blends, but other materials such as cotton and wool are used as well.

There are several variations based on the Zentai suit including mummy bag (similar to a sleepsack) and hybrid suits consisting of either a single leg and arms, or separate legs and no arms.