This sparkly bra has an opulence you may associate with a more sophisticated vixen. It’s also so hot you’ll want to eat yourself up with a spoon. Here’s where a fancy yarn can really make a garment sizzle. Karabella Sequins is a lace mohair yarn strung with delicate, minute sequins, for gorgeous sparkle and feathery lightness. And even the XL uses only one ball, making the splurge quite ­agreeable.