Ping An Group via Amazon offers the Kayizu Men's Premium Soft Cotton Boxer Briefs 6-Pack in Black/Grey or Black/Grey/Blue for $23.99. Coupon code "VVEQLIJP" cuts that price to $19.99. Plus, Prime members bag free shipping. That's tied with our October mention, $4 off, and the lowest price we could find. They're available in sizes S to XXL. Deal ends December 31.