For a limited time, get five cotton undies for $15 now at Aerie. Choose from different prints and styles, like the pictured Boybrief with Crochet Trim. Some undies are normally as much as $9.50 each, but add any five to your cart and the total will automatically adjust to $15. Shipping is $7 or free when you spend $50 or more. Sales tax is charged in most states.