Costco has a deal on Nautica Modal Kniht Boxers. I believe regular price is $14.99 for a set of 3 boxers. I paid $10.00 or $9.99 today.
I've read great things about Modal material underdear, and I'm pretty happy so far. Material breakdown is 95% model, 5% spandex.
I bought this at my local SoCal Costco. Don't see this deal online at Costco.com.
Here's a link to the product at Nautica's website:
Find a Warehouse: https://www.costco.com/