Brunello Cucinelli, the $2,000 cashmere sweater-selling master of 'stealth wealth' fashion, is booming as the 'loud luxury' trend wanes

• Brunello Cucinelli, the poster child of the "quiet luxury" movement, is booming.
• The brand is known for its cashmere sweaters that can cost between $1,000 and $6,000. 
• "Quiet luxury" has been dominating the fashion world and shows no signs of losing steam.

Business at Brunello Cucinelli, which has become the poster child of the "quiet luxury" fashion movement, is booming.