flauschig
fluffy
Pleasantly soft, loose, and woolly, so that it feels good to touch.
Der neue Pullover ist unglaublich flauschig und warm.
The new sweater is incredibly fluffy and warm.

fluffy
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fluffy
Pleasantly soft, loose, and woolly, so that it feels good to touch.
Der neue Pullover ist unglaublich flauschig und warm.
The new sweater is incredibly fluffy and warm.

The adjective 'flauschig' (fluffy) comes from the noun 'der Flausch', which refers to a soft, loose mass of fibers or hair. So something that is 'flauschig' (fluffy) has a lot of 'Flausch' (fluff).
Die Katze hat ein sehr flauschiges Fell.
The cat has very fluffy fur.
'flauschig' (fluffy) often describes soft textiles or the fur of animals. Typical nouns are 'Decke' (blanket), 'Handtuch' (towel), 'Kissen' (pillow), 'Teppich' (carpet/rug), but also 'Kätzchen' (kitten) or 'Küken' (chick).
Ich liebe es, mich nach dem Bad in ein flauschiges Handtuch zu wickeln.
I love wrapping myself in a fluffy towel after a bath.
The word 'flauschig' (fluffy) has a very positive, cozy, and warm connotation. It is often used to convey a feeling of comfort and coziness.
Für den Winter habe ich mir extra flauschige Socken gekauft.
I bought myself extra-fluffy socks for the winter.
hard
'hart' and 'flauschig' are opposites when describing the texture or feel of things. 'Hart' means that something is firm and does not give way easily. 'Flauschig' means that something is soft, loose, and pleasantly woolly. 'Hart' fits, for example, with stone, wood, or a firm bed. 'Flauschig' is more suitable for a blanket, a sweater, or a carpet that feels nice to touch.

Nach dem Waschen ist der neue Pullover noch ganz flauschig.
After washing, the new sweater is still very fluffy.
Die Matratze im Hotel war so hart, dass ich kaum schlafen konnte.
The mattress in the hotel was so hard that I could hardly sleep.