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bondage suit

n. A close-fitting garment with attachments used for bondage

Wikipedia
Bondage suit

A bondage suit, also commonly called a gimp suit, is a garment designed to cover the body completely (usually including the hands and feet), fitting it closely, and often including anchor points for bondage. It often has an attached hood; if it does not, it often is worn with a bondage hood or "gimp mask". The suit may be made from any material; leather, PVC, rubber, spandex, and darlexx are the most usual. Leather, not being stretchy, cannot fit as tightly as the others.