---
title: "Overnight Hair Mask — £163K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/beauty/overnight-hair-mask"
last_updated: "2026-08-09T14:03:57.574Z"
locale: en
meta:
description: "Niche score 39/100 · £163K/yr market · 110K searches/yr · £16.45 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 39/100 · £163K/yr market · 110K searches/yr · £16.45 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Overnight Hair Mask — £163K/yr Amazon UK Niche (2026) - Flapen"
---
# **overnight hair mask**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 34Growth 14Conversion 83Competition 11Returns 98Price range 56Avg price 79Brand share 0Review moat 23Quality gap 40
**Returns**
**Incredible****0.4%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****9.1%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****£16.45**
avg listing price — sweet spot $15–$100
**Price range**
**Good****£3.52–£29.55**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****£163K**
£163K/yr · 110K searches
**Review moat**
**Bad****8,133.8**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-22.2%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****86%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, overnight hair mask is a £163K/yr Amazon United Kingdom market (110K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Nov–Dec. Verdict: Skip it — 39/100.
Data updated Jul 20, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **overnight hair mask market data**
- **Units sold / yr**
- **8K–10K**
- avg 750–1,000/product
- **Revenue / yr**
- **£132K–£165K**
- units × avg price
- **Conversion rate**
- **9.1%**
- **Avg BSR**
- **#39**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **90%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **65 months**
- **Avg seller age**
- **148 days**
## **Competition & brand share**
The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**3 **▼falling
**Sellers**
**19**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**86%**
Top 20: 100%
**Open market**
**0%**
- KÉRASTASE49% - Moroccanoil48% - OGX3%
## **Demand & seasonality**
Weekly Amazon search volume, last 85 weeks — -22.2% search growth over the last 90 days.
3K2KPrime Day '25Spike '25Black Friday '25Spike '26 seasonDecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Nov, Dec · busiest ÷ quietest = 2.8×
[**Open Trend **](https://flapen.com/research/uk/beauty/overnight-hair-mask/trend)
## **Top overnight hair mask search terms**
- **moroccan oil hair mask**33K/yr-25.8%8.8% conv. - **kerastase night serum**22K/yr-23.4%8.6% conv. - **overnight hair mask**14K/yr-14.6%0.9% conv. - **moroccan oil mask**6K/yr-5.3%9.7% conv. - **overnight hair treatment**7K/yr-27.1%1.4% conv. - **kerastase 8h magic night serum**6K/yr-23.1%10.6% conv. - **kerastase overnight hair serum**5K/yr-20.2%8.8% conv. - **kerastase night serum hair**7K/yr-48.3%10.1% conv. - **moroccanoil hair mask**4K/yr+20.0%9.8% conv. - **moroccan hair mask**3K/yr-0.3%6.6% conv. [**All search terms **](https://flapen.com/research/uk/beauty/overnight-hair-mask/search-terms)
## **Top overnight hair mask products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%£16K20%£33K30%£49K40%£65K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Kérastase Nutritive Nourishing Hair Serum with Niacinamide Overnight Leave-In Treatment for Dry Hair Lightweight and Non-Greasy 8H Magic Night Serum 90 ml**KÉRASTASE**£29.55**4.6★7,865 rev](https://www.amazon.co.uk/dp/B0BZZJWGPQ) [2**Moroccanoil Intense Hydrating Mask 250ml (Pack of 1)**Moroccanoil**£23.72**4.6★17,189 rev](https://www.amazon.co.uk/dp/B002N5MKMG) [3**Moroccanoil Intense Hydrating Mask**Moroccanoil**£8.00**4.6★17,189 rev](https://www.amazon.co.uk/dp/B0094JGXV8) [4**Kérastase Nutritive 8H Magic Night Hair Serum Overnight Nourishing Hair Serum For Dry Hair With Plant Proteins & Niacinamide 30 ml**KÉRASTASE**£16.69**4.4★1,433 rev](https://www.amazon.co.uk/dp/B0F2QZQWDN) [5**Moroccanoil Weightless Mask**Moroccanoil**£28.76**4.5★3,139 rev](https://www.amazon.co.uk/dp/B0068M4E6A)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Kérastase Nutritive 8H Magic Night Hair Serum Overnight Nourishing Hair Serum For Dry Hair With Plant Proteins & Niacinamide 30 ml**KÉRASTASE**£16.69**1,433 rev1y ago](https://www.amazon.co.uk/dp/B0F2QZQWDN) [**OGX Rescue Fusions Deep Recovery Overnight Treatment Infused with Keratin Pro-Vitamin B5 up to 3x Stronger Hair Lavender & Chamomile Scent 125ml**OGX**£6.08**121 rev1y ago](https://www.amazon.co.uk/dp/B0DQLFFR5F) [**Moroccanoil Intense Hydrating Mask**Moroccanoil**£3.52**17,189 rev1y ago](https://www.amazon.co.uk/dp/B01A955Q5O) [**Kérastase Nutritive Nourishing Hair Serum with Niacinamide Overnight Leave-In Treatment for Dry Hair Lightweight and Non-Greasy 8H Magic Night Serum 90 ml**KÉRASTASE**£29.55**7,865 rev3y ago](https://www.amazon.co.uk/dp/B0BZZJWGPQ) [**Moroccanoil Weightless Mask**Moroccanoil**£9.32**3,139 rev12y ago](https://www.amazon.co.uk/dp/B00G6JOFOG)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Moroccanoil Intense Hydrating Mask**Moroccanoil**£3.52**4.6★**▲ 111%**](https://www.amazon.co.uk/dp/B01A955Q5O) [**OGX Rescue Fusions Deep Recovery Overnight Treatment Infused with Keratin Pro-Vitamin B5 up to 3x Stronger Hair Lavender & Chamomile Scent 125ml**OGX**£6.08**4.3★**▲ 76%**](https://www.amazon.co.uk/dp/B0DQLFFR5F) [**Kérastase Nutritive 8H Magic Night Hair Serum Overnight Nourishing Hair Serum For Dry Hair With Plant Proteins & Niacinamide 30 ml**KÉRASTASE**£16.69**4.4★**▲ 17%**](https://www.amazon.co.uk/dp/B0F2QZQWDN) [**Moroccanoil Intense Hydrating Mask**Moroccanoil**£8.00**4.6★**▲ 11%**](https://www.amazon.co.uk/dp/B0094JGXV8) [**Moroccanoil Intense Hydrating Mask 250ml (Pack of 1)**Moroccanoil**£23.72**4.6★**▲ 10%**](https://www.amazon.co.uk/dp/B002N5MKMG)
**~~View all trending →~~**
## **What buyers say about overnight hair mask**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**23%
*“Really good even in first ise”*
**Smell**22%
*“smell fresh”*
**Hair Styling**10%
*“Really loving this my hair already feels in much better condition”*
**Soft Feel**9%
*“Leaves hair soft and shiny”*
**Moist/Dry**8%
*“helps my hair stay hydrated and soft”*
**Value For Money**4%
*“frizzy worth the price”*
**Hair Growth**4%
*“my hair feels great the next day”*
**Brightness/Shine/Glow**2%
*“with a beautiful shine by the next morning”*
**Suitability Straight Hair**2%
*“I have straight hair”*
**Suitability Dry Skin**2%
*“Lovely night treatment for dry hair”*
### **What buyers complain about **
**Value For Money**25%
*“Definitely not worth the price”*
**Moist/Dry**18%
*“Made my hair very dry straw like”*
**Hair Related**7%
*“I was really disappointed with this hair serum”*
**Size-Overall**7%
*“Glad I didnt opt for the full size”*
**Quality-Overall**7%
*“Poor quality”*
**Suitability Dry Skin**7%
*“Didnt make my dry hair feel nourished”*
**Product Condition**4%
*“Item look like it had been opened or used before”*
**Functionality-Overall**2%
*“Ineffective”*
**Smell**2%
*“The smell was completely intolerable for me”*
**Symptom Reduction**1%
*“haven't noticed any difference”*
### **Top return reasons **
**Functionality-Overall**13%
**Product Condition**10%
**Moist/Dry**10%
**Advertised Vs Actual Product**8%
**Suitability Short Hair**7%
**Defective Material/Parts**6%
**Size-Overall**6%
**Oily/Greasy**5%
**Smell**5%
**Value For Money**4%
## **Common questions**
- **Is overnight hair mask profitable to sell on Amazon United Kingdom?**
- The niche generates £163K/yr across 10 tracked products. 90-day search growth is -22.2%. Flapen's verdict: Skip it (39/100).
- **How competitive is the overnight hair mask niche?**
- 3 brands and 19 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in overnight hair mask?**
- Top complaints mined from reviews: Value For Money, Moist/Dry, Hair Related. The return rate is 0.4%.
- **When does demand for overnight hair mask peak?**
- Demand peaks in Nov–Dec; the busiest month runs 2.8× the quietest.
- **What does it cost to enter the overnight hair mask niche?**
- Listings span £3.52–£29.55; the average listing price is £16.45 (sweet spot $15–$100). The average incumbent carries 8,134 reviews — the moat a new listing must climb.
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