Hair Shampoo

Hair Shampoo That Actually Delivers What the Label Promises

Most shampoos make the same claims. Volumizing. Hydrating. Clarifying. But a label is not a formula. The ingredient list tells the real story, and most conventional shampoos use the same base with a different bottle and a different word on the front. Number 4 shampoos are different. Each formula is built around what your hair actually needs, with botanical actives that do the work rather than coating over the problem.

Three Hair Shampoos, Each Built with a Clear Purpose

Hydrating Shampoo for dry, normal, or color-treated hair. Argan oil, vitamin B5, and botanical humectants replenish moisture at the wash step, smoothing the cuticle and improving softness from the rinse rather than waiting for a treatment to do the rescue work. Carried by the L'Eau de Mare fragrance of ylang orchid, jasmine, vetiver, and patchouli.

Volumizing Shampoo for fine, flat, or limp hair. A lightweight formula that lifts at the root, removes buildup, and adds body without any conditioning residue pulling hair down by noon. Infused with the Fleurs de Temps fragrance of linden blossom, trembled gardenia, and sheer bark wood.

Daily Clarifying Shampoo for any hair type that needs a proper reset. Removes product residue, hard water deposits, and the buildup that makes hair feel coated no matter what you apply. Formulated to clear thoroughly without over-stripping, and carried by the Lumière d'Hiver signature fragrance.

What Every Number 4 Hair Shampoo Has in Common

Different formulas, same clean foundation. Every shampoo here is sodium and sulfate-free, vegan, cruelty-free, paraben-free, gluten-free, shark squalene-free, and made in the USA. No harsh detergents, no unnecessary additives. Gentle enough for regular use, effective enough to earn a permanent place in your routine.

Your Hair Today Is Not the Same Hair It Was a Year Ago

Hair changes with color, seasons, heat damage, and stress. The shampoo that worked two years ago may not be what your hair needs now. Take the Hair Quiz for a personalized recommendation matched to your hair's current condition. Pair your shampoo with a matching conditioner from the Hair Conditioner collection for a complete wash routine.