Editor's TipEditor's Tip

To keep your hair free of product build-up, wash hair with Number 4’s Clarifying Shampoo.

Birchbox Breakdown

Our Miami-based friends told us that this multitasking styling foam helps their hair look pristine through a summer’s worth of sweltering heat and tropical humidity. Naturally intrigued, we decided to investigate it for ourselves, and we’re pleased to report it works in all climates. The body-boosting formula provides flexible hold and can be used to define curls or fight frizz. Bonus: It also prevents heat and sun damage and extends the life of your color with loads of nourishing botanicals.

How it Works

Get this styling foam for free when you purchase any full-size Number 4 Hair Care product(s) in the Birchbox Shop. Just use code NUMBER4FOAM at checkout. Limit one per cart. Cannot be combined with other offers. In order to return any item in your order, you must also return the styling foam.

How to Use

Dispense a small amount of foam into hands and distribute through damp hair, starting at roots for added volume and working through to ends. Blow-dry or style as usual.

More for You!
  • Free returns within 90 days of purchase
  • Extra samples and gifts in the Bonus Shop