Beauty Kevin Murphy UN.TANGLED vs SMOOTH.AGAIN: Best Pick Guide
KEVIN.MURPHY UN.TANGLED and SMOOTH.AGAIN are the two most popular leave-in treatments for manageability. UN.TANGLED is a spray detangler for knot-free combing on all hair types. SMOOTH.AGAIN is a cream leave-in built to fight frizz on thick, coarse hair. This head-to-head helps you choose.
| Factor | KEVIN.MURPHY UN.TANGLED Leave-In Conditi | KEVIN.MURPHY SMOOTH.AGAIN Leave-In Treat |
|---|---|---|
| Formula type | Lightweight detangling spray | Smoothing leave-in cream |
| Main job | Knot removal and easy combing | Frizz control and smoothing |
| Best for | All hair types, tangles | Thick, coarse, unruly hair |
| Application | Mist onto damp hair | Smooth through damp hair |
| Heat protection | Light thermal defense | Moderate thermal defense |
| Size | 5.1 fl oz | 6.7 fl oz |
| Price range | Check price | Check price |
| Cruelty free | Yes | Yes |
Our Verdict
Choose UN.TANGLED if knots and painful combing are your main problem. Choose SMOOTH.AGAIN if frizz on thick or coarse hair bothers you most. People with thick, tangly hair often use UN.TANGLED first for detangling, then SMOOTH.AGAIN for frizz control.
More Top Picks in This Category
Not sold on either of these two? Here are more bestselling options worth considering.
Best for: Curly and wavy hair wanting definition.
KEVIN.MURPHY KILLER.CURLS Anti-Frizz Curl Cream
- Defines curls and waves
- Anti-frizz leave-in cream
- Enhances natural curl pattern
- For curly and wavy textures
Pros
- Beautiful curl definition
- Controls frizz without crunch
Cons
- Not for straight hair
- Can build up if overused
Want the Full Picture?
Protein or Moisture: Diagnosing What Your Hair Needs
How to diagnose whether hair needs protein or moisture is the biggest unanswered question in hair care, and leave-in choice depends on it. The wet stretch test: take a single wet strand and gently stretch it. If it stretches far and then breaks, it needs protein. If it snaps immediately with no stretch, it needs moisture. If it stretches slightly and returns, the balance is fine.
How each deficiency feels: protein-deficient hair feels mushy when wet and limp when dry, moisture-deficient hair feels rough and tangles easily. What happens when you guess wrong: protein on moisture-starved hair makes it stiff and brittle, moisture on protein-starved hair makes it limp and gummy. Where these leave-ins fit: UN.TANGLED is a detangling spray, not a protein treatment, so it suits the moisture side and daily manageability. SMOOTH.AGAIN is a cream leave-in for thick, coarse hair fighting frizz, which is usually a moisture and smoothing need. Neither replaces a dedicated protein treatment when the stretch test says protein. The 2A hair type guide covers routine building for fine hair that tangles easily.
Reading the Leave-In Ingredient List
How to read a product ingredient list to separate the real active from marketing is never taught, so here it is for leave-ins. The first-five-ingredients rule: the first five ingredients make up the bulk of the formula, everything after is present in small amounts. If "argan oil" or a botanical extract appears near the end of the list, it is marketing at 0.1%, not a functional dose.
What to look for in a detangling spray like UN.TANGLED: conditioning agents and silicones or lightweight oils in the first half of the list, which do the actual detangling work. What to look for in a smoothing cream like SMOOTH.AGAIN: emollients and anti-frizz polymers early in the list. The fragrance position matters: fragrance in the first five means a heavily scented formula, which can irritate sensitive scalps. And the alcohol check: fatty alcohols like cetyl alcohol are conditioning and good, short-chain alcohols like alcohol denat are drying and bad in a leave-in. Apply the rule to any leave-in before buying, the marketing claims describe the last ingredients, the first five describe the product.
Seasonal Leave-In Swaps
How seasonal changes should alter the routine in concrete terms is never specified, so here is the leave-in calendar. Winter: indoor heating and cold air dry hair out, so switch to the richer option, the SMOOTH.AGAIN cream for thick hair, or layer the UN.TANGLED spray under a heavier cream for fine hair. Static is the winter signature problem, and leave-in conditioning is the fix, dry hair generates more static.
Summer: humidity causes frizz, which is the SMOOTH.AGAIN use case, but sweat and more frequent washing mean lighter application, too much leave-in plus sweat causes buildup. The specific swaps: increase leave-in richness in November, lighten it in May, and add a clarifying wash monthly in summer to reset the buildup from sunscreen, sweat, and product. Spring and fall are transition months, adjust based on how the hair feels rather than the calendar. The Aussie hair oil guide covers oil layering for the dry winter months.
Silk vs Satin vs Cotton: The Pillowcase Question
Pillowcase comparisons never include actual friction data, so here is the honest version. The friction ranking: silk has the lowest friction coefficient, satin (usually polyester satin) is close behind, cotton is significantly higher. Lower friction means less tangling overnight, which is directly relevant to detangling-spray users: a silk or satin pillowcase reduces the morning knots that UN.TANGLED has to fix.
Who benefits most: curly and coily hair, which tangles most overnight, and long hair of any type. The silk vs satin distinction: real silk is a protein fiber that absorbs less moisture from the hair, polyester satin is smooth but does not breathe as well. Both beat cotton for tangle reduction. The cost reality: satin pillowcases cost a fraction of silk and deliver most of the friction benefit, so they are the rational starting point. The care note: silk needs delicate washing, satin is machine-washable, which affects whether the pillowcase actually gets used long-term. Pair the pillowcase with the leave-in routine and morning detangling time drops noticeably.