It's "leggings are". Some clothing-related words are only used in a plural form and require a plural form of a verb.
It's "leggings are". Some clothing-related words are only used in the plural and require a plural form of a verb.
My leggings are clean.
My leggings is clean.
However, when using the expression "a pair of leggings", we need a singular verb because the word "pair" denotes a single unit.
There is a pair of leggings on the bed.
There are a pair of leggings on the bed.
Follow the same convention with other verbs (have, look, fit, etc.)
Your leggings have a chocolate stain.
Your leggings has a chocolate stain.
And remember, use a plural determiner or pronoun (they, them, these, those, etc.) with plural nouns, such as "leggings".
Those leggings look great! Where did you buy them?
A partial list of clothing-related nouns that only have a plural form, and therefore take "are":