The coupon was in the Red Plum 9/29. It was for $2.50 off any one TresEmme base product, (excludes Keratin Smooth, Platinum Strength, Split Remedy, Naturals and trial size).
Well check this out, not trial size and not any of the other excluded products either. :) Bam. enjoy your free shampoo/conditioner or both. Also, you can only use two like coupons in the same transaction. Have a lot? Split it up.