Nike offers its Nike Men's Dri-Fit Training T-Shirt in four colors (Grey pictured) for $19.97. Coupon code "KICKS20" drops it to $15.98. Nike+ members receive free shipping. (Not a member? It's free to join.) That's $9 off list and the lowest total price we could find. It's available in sizes S to XXL, although not in all size/color combinations. Deal ends July 23.