My mistress' eyes are nothing like the sun;
Coral is far more red than her lips' red;
If snow be white, why then her breasts are dun;
If hairs be wires, black wires grow on her head.
I have seen roses damask, red and white,
But no such roses see I in her cheeks;
And in some perfumes is there more delight
Shakespeare is talking about his muse’s hair, which a modern reader might interpret as stiff and coarse. 
 To Elizabethan readers, Shakespeare’s comparison of hair to ‘wires’ would refer to the finely-spun gold threads woven into fancy hair nets. Many poets of the time used this term as a benchmark of beauty.
Sonnet 130