Woot offers Amazon Essentials Men's Cotton Jersey Boxer Brief 5" Boxer Brief 5 PK for $6.99 (reg. $18.90) free shipping. 

Product Description: 
We listen to customer feedback and fine-tune every detail to ensure our clothes are more comfortable, higher quality, and longer lasting—at affordable prices for the whole family.

• FIT: Slim fit through hip, thigh and leg opening. Sits below the waist.
• COTTON JERSEY: Soft, smooth cotton blend. This breathable lightweight natural fabric feels soft against your skin, while the added spandex offers a flexible fit that moves with you
• 95% Cotton, 5% Elastane
• BOXER BRIEF: A casual Brief design, offering both comfort and functionality for everyday wear.
• DETAILS: Designed with soft elastic around the waist for support. Super soft flexible stitching on the leg opening for comfort and stretch and a printed label at the back waist.