Amazon offers the Calvin Klein Men's Cotton Classics Boxer Brief 4-Pack in Black/Reds or White/Reds for $21.25. In-cart, it drops to $14.87. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $5.48.) That's $5 under our July mention, the lowest total price we've seen, and the best deal we could find for a similar 4-pack by $10. They're available in sizes S to XL.