Ping An Group via Amazon offers the Kayizu Men's Ultimate Soft Cotton Stretch Knit Boxers 5-Pack in Assorted Colors for $22.99. Coupon code "YHVORRE8" drops it to $17.99. Plus, Prime members receive free shipping. That's $5 off list and the lowest price we could find. They're available in sizes S to XXL. Deal ends February 28.

Update: The coupon has expired; however, the price has since dropped to $17.99.