Four Reasons Professional

Fiber Mousse

6.56 FL oz

  • Fiber-rich mousse is the ideal base product for voluminous blow-outs
  • Weightless volume and flexible hold
  • Heat protection for blow-drying
  • Works especially well with fine hair

Cruelty free
& Vegan

Recyclable materials for

European quality
& reliability

Sustainable manufacturing

Fiber Mousse gives bounce and flexible, long-lasting hold

A fiber mousse that gives hairstyle flexible, long-lasting hold and bounce. Fibers add support for the style while letting hair move naturally. Enjoy voluminous hair with fullness that lasts! Four Reasons Professional Fiber Mousse is a professional-quality product created from the best ingredients. It has a vegan formula and recyclable packaging.

Key ingredients

Vegan formula

Vegan and cruelty-free formulas ensure we use only the best ingredients

Sustainable packaging

Recycled materials are used in packaging, and its 100% recyclable when empty.

Full list of ingredients + -

Aqua, Butane, Propane, Alcohol Denat., Polyquaternium-68, Propylene Glycol, Isobutane, Polyquaternium-11, Cocotrimonium Methosulfate, PEG-40 Hydrogenated Castor Oil, Ceteareth-20, Laureth-4, PEG-90M, Triethanolamine, Phenoxyethanol, Ethylhexylglycerin, Parfum, Alpha Isomethyl Ionone, Benzyl Salicylate, Butylphenyl Methylpropional, Citronellol, Geraniol, Limonene, Linalool.

Fiber Mousse gives bounce and flexible, long-lasting hold

How to use

Apply evenly to washed, towel-dried hair, focusing on the roots

Comb through to spread product evenly


Style as desired

PRO TIP: Get bouncy, super-soft curls that last all day long!

Customer Reviews

Based on 29 reviews
Barbara Spagnoli
Defines My Waves/Curls & Adds Volume To My Long Hair

I have enjoyed using the Four Reasons Professional Fiber Mousse. I have long, fine hair with multiple textures in it. I have waves and curls with varying textures throughout my hair. I decided to try this mousse out to see how it would do with defining my waves/curls, and to see if it could add some volume as well. I especially wanted to add volume to my hair when it was in a ponytail. I followed the directions and blowdryed my hair after applying the mousse. The mousse definitely did add more volume to my hair when it was down or already pulled up in a slicked-back ponytail. Blowdrying definitely helped to add definition and volume to my fine hair. This product even helps to add volume to my hair in-between washes, which is nice, because dry shampoo only seems to make my hair feel more dirty and gross.Overall, I really like this mousse. It is a versatile hair styling product, and it smells nice and fresh. I would recommend giving it a try.

Susan Tan
Nice volume!

I love that this is a vegan product! Great for fine hair. Mousse in general tends to be great for adding volume to my hair, and this one was no different. Overall a great buy!

Chandi Leis
Great volumizing product

This mousse is great for volumizing—my daughter has thin, fine hair and it really gives her a lift!

Amanda Thatcher
Thick and a bit sticky

This mousse comes out all foamy, as it should. The foam is thick and a bit sticky, but my hairstyle held up for the whole day. I'm quite happy with it.

Better Than Oribe!

My fab stylist used this mousse on me, and I was very, very surprised by the result...I have long, fine layered curly hair, and my issue has always been about maintaining volume after styling. Enter Fiber Mousse - my hair has kept this glorious fullness for over a week, and it still looks good on day 10 (that has never happened). Plus, my hair is soft to the touch, and that has never happened either...usually soft hair means the hold won't last, but not with this mousse. I've been using Oribe's volumizing mousse, but the fiber mousse sells for a far more reasonable price. No one paid me to leave this review, and I don't know anyone in this company. My review is authentic, and I'm thrilled that my stylist used the product on me that she, randomly, found on Amazon. Score!

Have any questions about Four Reasons?

Color Mask Treatments are pigmented deep conditioners, and Color Mask Shampoos are pigmented shampoos.

Color Masks are specially formulated for color-treated hair, as they perfectly
take into account all that colored hair needs: color refresh and deep

Color Masks don't contain harsh chemicals like ammonia. Quite the contrary
actually! They gently cleanse and deeply condition and repair hair, while
depositing color pigments to the hair's surface.

Color Masks are intended to tone hair or maintain your existing hair color. We all know that beautiful hair color can fade and lose its vibrancy within a few washes. That's where Color Masks come in! Use in place of regular shampoo or conditioner whenever your hair color needs to be refreshed. Simple as that!

Yes! All Four Reasons products are 100% vegan and cruelty-free.
We do not test, and we do not have anyone else test Four Reasons products or their ingredients,on animals. In our products, we use raw materials from known European suppliers. According to EU legislation, testing these raw materials on animals has been banned since 2009.

Yes, the grass is actually greener on this side!
By the end of 2020, 99% of our packaging is recyclable when empty, and 35% of the plastic packaging for our retail products were either recycled or bioplastic. Cardboard boxes used in product shipments are also 85% recycled cardboard, the printed reclaimed paper used to fill the transportation boxes is 100% made of recycled materials and the packaging tape is recycled paper. Our shipments may not be the prettiest but it’s not our style to spoil the environment to please the eye – beauty doesn’t come in one shape and size, and this applies to packaging, too!

The safety of our staff, customers, and community is always top of mind. In light of COVID-19, we have taken steps to prevent the spread of germs inside and outside of our facilities. That includes increased cleaning and disinfecting, work from home when possible, and other measures as recommended by World Health Organization (WHO) and Center for Disease Control (CDC).

US orders ship from Missouri, USA.

Fiber Mousse

Fiber Mousse

6.56 FL oz