IGK Good Behavior Ultra Smooth Shampoo
An instantly smoothing shampoo with Frizz-Blocking Barrier technology to fight frizz before it forms, for hair that’s 5X smoother* after just 1 use. The oil-rich formula deeply nourishes, adds shine and silkiness, perfect for any frizz-free look, curly or straight!
Key Benefits
- Frizz-Blocking Barrier technology prevents frizz from forming
- Delivers 5X smoother hair after one use
- Oil-rich formula deeply nourishes hair
- Enhances shine and silkiness
- Works for both curly and straight hair types
Product Specifications
| Feature | Detail |
|---|---|
| Shampoo Type | Conditioning Shampoo |
| Key Technology | Frizz-Blocking Barrier |
| Smoothing Effect | 5X smoother after one use |
| Shine & Texture | Increases shine and silkiness |
| For Hair Types | Curly, Straight |
FAQ
How does the Frizz-Blocking Barrier technology work?
The Frizz-Blocking Barrier technology forms a protective layer on the hair surface to prevent frizz from developing before it occurs, helping maintain smoothness and reduce frizz throughout the day.
Is this shampoo suitable for color-treated hair?
Yes, the oil-rich formula is designed to nourish and protect hair without stripping color, making it suitable for color-treated hair.
Can I use this shampoo with other hair care products?
Yes, it can be used as part of a regular hair care routine and pairs well with other IGK products for enhanced results.

Kimberly Walsh –
I’ve tried several smoothing shampoos, but this one delivers real results. My hair feels instantly smoother and looks more defined after just one use. No more frizz at the ends, even on humid days. The shine is noticeable and my curls stay defined longer.
Adrian Martin –
Great for daily use. My straight hair has a silkier feel and looks healthier. The frizz control is excellent, especially in the morning. I don’t need to use heavy conditioners after this.
Luke Cameron –
My curly hair used to be messy and frizzy, but after switching to this shampoo, it’s much more manageable. The texture is soft and the hair holds its shape better. I love the shine without being greasy.
Phil Avery –
It works well for both curly and straight hair. After one wash, I noticed a significant improvement in smoothness. The formula is rich but not heavy, and it doesn’t leave residue.
Thomas Black –
This shampoo has changed my hair routine. I no longer spend extra time on styling. The frizz control is strong and the hair feels soft and shiny from day one.