What is this close-up picture? (WotsThat: Thick wool sweater texture (macro))

Question

What object is shown in this zoomed-in close-up photo?

MoonstoneDrift · Accepted Answer

Thick wool sweater texture (macro). Wool fibres are naturally crimped and elastic, which traps warm air between the strands, and that same crimp is what lets a wool sweater stretch and spring back into shape.

Answer: Thick wool sweater texture (macro)

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