Amazon has 3-Pack adidas Men's Climacool Superlite Quarter Socks (Black) on sale for $6.97. Shipping is free w/ Prime or on $35+ orders.

Product Info:

• Moisture-wicking yarn keeps your feet dry from sweat
• Lightweight yarns and durable construction for a close fit
• Targeted cushion zones in the heel and toe for added comfort and durability
• Mesh on top of the foot provides breathability