noun, masculine/ˈblumeɾ/plural: blúmeres
blúmer is masculine in Spanish.
(a pair of) bloomers (clothing)
“Para la ropa interior usar recipientes circulares y colocarlas en ellas, poner hasta cinco blúmeres y tres sostenes en uno.” — For underwear use circular containers and place them there, place up to five pairs of bloomers and three bras in each one.
Borrowed from English bloomers, named after American women's-rights activist Amelia Bloomer (1818–1894).