Hanes has the 2-pack Hanes Men's X-Temp FreshIQ Workwear Pocket Tee (various colors) on sale for $8.

Add quantity of 3 to cart (mix or match colors and sizes, 6-pack total) to reach $24 - 20% off automatically in cart - 20% off with unique code when you sign up for newsletter (scroll down and enter email address for offer signup) + $2 shipping = $17 shipped. Note: shipping is free on orders over $40.