ふわふわ (fuwa fuwa) Fluffy

ふわふわ (fuwa fuwa) describes something that is light, airy or fluffy.

ふわふわの綿菓子(わたがし)
(fuwa fuwa no watagashi)
fluffy like cotton candy

ふわふわのセーター
(fuwa fuwa no sētā)
fluffy sweater

風船がふわふわ(と)飛(と)んでいった
(fūsenga fuwa fuwa to tondeitta)
The balloon floated away into the air.

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It also describes a floating feeling when you feel restless, unsettled or fickle:

気持(きも)ちがふわふわ（と）している
(kimochi ga fuwa fuwa (to) shiteiru)

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Learn more words and phases to express your emotions here.

*The と adds focus to the manner, but it can be omitted.

Japanese Onomatopoeia for Describing Food