@flora90,
Hai hiya & highest.
Zentai (from the Japanese ゼンタイ) is a term for skin-tight garments that cover the entire body. The word is a contraction 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.
I usually accessorise in black when wearing this little number.