Chris McMillan doesn’t put his name to just any product. When he brought his eponymous line to market last year, it was a tight edit of styling essentials — everything a pro or consumer could possibly need. Until a new breakthrough.
Enter The Glassy Smooth Hair Oil.
This is a next-gen hair oil delivered as a water-light, ultra-fine mist that acts as both a weightless heat protectant (up to 450 degrees) and a shine booster. Designed as the effortless final step in any styling routine, the mist evenly distributes a veil of shine while smoothing frizz and enhancing hair’s natural reflectivity, all without weighing hair down or leaving a greasy finish.
McMillan knew there would be skepticism. “Hair oils have always been tricky. They promise to be weightless, but you know how it goes. Heavy, greasy, sits on top of the hair,” he says. “I always knew that if I was going to make one, it had to actually deliver. Not just say it. Do it.”
McMillan continues, “So I challenged our chemist to do something different: to create an oil with the viscosity of water. The lightest oil possible, with a superfine mist that disappears instantly. One that still performs: maximum shine, real hydration, smooths frizz all day. I wanted it to be easy and intuitive to use — no droppers, no guessing how much you need. Just a superfine mist. You can’t mess it up.”

What’s Inside
- Japanese Tsubaki Oil: Gives hair a glassy reflective finish
- Black Currant Oil: Packed with omega-3s to improve hair elasticity
- Moringa Oil: Great for dry hair, deeply nourishes and smooths
- Wheat Oil: Strengthens hair to prevent breakage
- HS3™ COMPLEX: Proprietary complex providing heat protection up to 450°, increases shine, and strengthens the cuticle
How it Differs from Other Hair Oils
- Weightless, designed to not flatten hair
- Fast-absorbing for a clean, non-greasy finish
- Buildable and easy to layer
- Easy application (no heavy coating here)
- Works across all hair types, including fine hair

Read on for our exclusive Q&A with McMillan himself about The Glassy Smooth Hair Oil.
The Tease: What made you want to introduce a hair oil, given how saturated the market is?
Chris McMillan: Every hairstyle needs an oil, don’t be afraid to use it. Just like your body needs water, your hair needs oil. When you drink water, your skin glows, when you add oil to your hair, you get that same effect. It hydrates, adds shine, protects, and smooths. It also fights frizz and fights humidity. For me, it’s really that simple, oil is essential.
How do you recommend that pros actually use The Glassy Smooth Hair Oil with clients?
McMillan: I always say, when you’re working with a new product, spray it into your hands first and get a feel for it. That’s how hairdressers work, we use our hands, it’s instinctive. Once you understand the texture and how it distributes, you’ll feel more comfortable working it through the hair or spraying it directly.
Everyone’s going to want to know… how are you using it behind the chair?
McMillan: If you have fine hair, I would start with the hands. The thicker the hair, feel free to spray it directly into the hair. It’s really about getting comfortable with the product and using it in a way that feels natural behind the chair. Oils should always be applied mid-length to ends, where the hair needs it most. Then you’ll see how fine the mist is, and how easy, and fun it is to work into the hair.

The Glassy Smooth Hair Oil ($58.00) is now available on Sephora.com and ChrisMcMillan.com.