noun
cotton flannel; flannelette
A soft, napped cotton fabric used for shirts, pajamas, and baby clothes.
このパジャマは綿フランネルでできている。
These pajamas are made of cotton flannel.
フランネル is a broader term for flannel, which can be made of wool or cotton. 綿フランネル specifically refers to cotton flannel.
Compound of 綿 (cotton) and フランネル (flannel), a loanword from English.