This duo pack from Nioxin consists of two products from the System 3 range. These products are the Nioxin System 3 Cleanser Shampoo and the Nioxin 3 Scalp Revitalizer Conditioner, which are also a part of a three-step regimen from Nioxin.
The first product from the duo pack is the Nioxin System 3 Cleanser Shampoo, which is the ideal product for bleached and chemically treated hair with light thinning. This product is also the best for hair strengthening and the amplification of the hair structure. It does a great job at preparing your hair and scalp for a thickening treatment, and it also gets rid of dirt, excessive oil, and various other environmental residues from your hair. Here are its directions of use.

Apply on wet hair and massage it to work it into a lather
Let it stay for a while before rinsing it off
Follow it up with other products from the system for best results

Here are the best characteristics of this shampoo.

Prepares the hair and scalp for the best thickening treatment and is perfect for natural hair with light thinning
The shampoo contains peppermint oil that refreshes your scalp after the first application, and it helps you obtain the best results when you use the shampoo with the other products from the system

The Nioxin System 3 Scalp Revitalizer Conditioner is the second product in the line, and it is perfect for normal to thin, medium to coarse, or natural to colored hair. The Scalp Revitalizer Conditioner makes the hair resilient, and it will also help in controlling the moisture balance for normal and thin hair. Here is how to use the conditioner optimally.

Apply to wet hair after shampooing in a massaging motion
Rinse it off after a while

Here are the top features of this conditioner.

Perfect for applying on normal, thin, medium, coarse, natural, and colored hair
Increases the resiliency of the hair and does its best to control the moisture balance of normal and thin hair