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silk floss
絹綿は保温性に優れた素材だ。
Silk floss is a material with excellent heat retention.
和布団の中に絹綿を詰めて仕上げた。
The Japanese futon was finished by stuffing it with silk floss.
軽くて暖かい絹綿の上着を羽織った。
I put on a light and warm silk-floss jacket.