Hard Hat Liner
FailDemand is soft, at -67.8% this quarter, so Hard Hat Liner is a Fail.
- Flapen Score
- 49 / 100Ranks 1,033 of 2,225 DIY & Tools niches · on the category median49
- Market size
- £17K/yr55K searches / yr
- 90-day growth
- -67.8%search demand this quarter
- Competition
- 27%top-5 click share · 36 brands · 48 sellers
Flapen Score
Hard Hat Liner against its category
The dotted line is the DIY & Tools average. Past it, Hard Hat Liner is stronger. Inside it, weaker.
Market
The Hard Hat Liner market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Hard Hat Liner 55K times last year and spent an estimated £17K. The top 5 brands take 60% of clicks. Demand peaks in Jan–Feb–Nov–Dec. Flapen scores it 49 out of 100, a Fail.
01 · Demand
An estimated 3.6% of those searches ended in a purchase.
Shoppers searched for this 55K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 3.6% of those searches ended in a purchase. Searches in the last 90 days moved -67.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated £17K a year.
- Searches, last 12 months
- 55K
- Growth, 90 days vs prior 90
- -67.8%
- Conversion, latest week
- 3.6%
- Market size, estimated
- £17Ka year
- Peak month
- November20.5× the quietest month
- Top search term
- helmet liner10K searches a year
02 · Price
A sale here is worth £8.64.
Listings sell for £8.64 on average, from £2.75 to £48.25. Amazon reports units sold in ranges. This niche sold 3K to 4K a year. The average listing sells 100 to 250 of them. At £8.64 that is £864 to £2K a year per listing.
- Average price
- £8.64under the $15 to $100 sweet spot
- Price range
- £2.75–£48.25
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 3K–4K
- Units per listing a year
- 100–250
- Revenue per listing a year
- £864–£2K
- Returns
- 1.2%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is ads and reviews.
94% of listings pay for placement with sponsored ads. 98% ship with Prime. On an average day, 8.6% of listings are out of stock. The average listing ranks #142 within Safety & Security. It carries 2,655 reviews at 4.30 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 94%
- Prime listings
- 98%
- Out of stock, average day
- 8.6%
- Average rank
- #142in Safety & Security
- Average rating
- 4.30 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 2,655per listing
- Listings tracked
- 63
04 · Newcomers
0 of last year's 11 launches cleared the first-year sales bar.
11 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 32 months on average, so a newcomer is not facing entrenched names.
- Launched, last 12 months
- 11
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 32 months
Products
Top Hard Hat Liner products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 22, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
EINSKEY 100% Cotton Skull Caps for Men Multipurpose Daily Wear Beanie Hat
- Price
- £5.95
- Rating
- 4.3/5
- Reviews
- 8,831
- Age
- 7y ago

EMPIRELION Cooling Skull Cap for Men Women Low-Profile Cycling Helmet Liner UPF 30+ Sun Protection Moisture Wicking Running Beanie Breathable Summer Sports Cap for Cycling Running Gym
- Price
- £10.19
- Rating
- 4.2/5
- Reviews
- 283
- Age
- 3y ago

flintronic Winter Skull Cap Beanie Cycling Caps Unisex with Windproof Thermal Fleece Breathable Bicycle Hat Motorcycle Helmet Liner with Ear Covers and Glasses for Skiing Running Skating-Black
- Price
- £5.12
- Rating
- 4.5/5
- Reviews
- 821
- Age
- 3y ago

French Fitness Revolution Helmet Liner Sweat Wicking Skull Cap Beanie. Ultimate Performance Moisture Wicking. Fits Under Helmets Charcoal Gray
- Price
- £8.45
- Rating
- 4.2/5
- Reviews
- 11,661
- Age
- 2y ago

MELASA 2-Pack Cooling Skull Cap Wicking Mesh Cycling Caps Under Helmet Summer Breathable Bicycle Motorcycle Sweat Hard Hat Liner Lightweight Wave Cap for Men and Women(Black&White)
- Price
- £12.18
- Rating
- 4.4/5
- Reviews
- 43
- Age
- 1y ago
Trending
estimated 90-day click momentum
2THESTARS Lightweight Cooling Skull Cap for Men Hard Hat Helmet Liner Moisture Wicking Sweatband Cycling Running Beanie - Black
- Price
- £9.50
- Rating
- 4.5/5
- Reviews
- 30
- Age
- 3mo ago

MELASA 2-Pack Cooling Skull Cap Wicking Mesh Cycling Caps Under Helmet Summer Breathable Bicycle Motorcycle Sweat Hard Hat Liner Lightweight Wave Cap for Men and Women(Black&Black)
- Price
- £12.00
- Rating
- 4.4/5
- Reviews
- 43
- Age
- 1y ago

WRELS 3 Pieces Cooling Helmet Liner Skull Cap for Men Women Sweat Wicking Cycling Running Head Cap Sports Hat for Outdoors
- Price
- £10.95
- Rating
- 4.4/5
- Reviews
- 104
- Age
- 1y ago

WTACTFUL 2pcs Cooling Skull Cap for Men Women Lightweight Breathable 3D Mesh Beanie Hat Thin Quick Dry Running Cap for Cycling Motorcycle Helmet Hard Hat Liner Summer
- Price
- £12.15
- Rating
- 4.3/5
- Reviews
- 1,860
- Age
- 3y ago

French Fitness Revolution Helmet Liner Sweat Wicking Skull Cap Beanie. Ultimate Performance Moisture Wicking. Fits Under Helmets White
- Price
- £7.52
- Rating
- 4.2/5
- Reviews
- 11,661
- Age
- 8y ago
Newest
by launch date
2THESTARS Lightweight Cooling Skull Cap for Men Hard Hat Helmet Liner Moisture Wicking Sweatband Cycling Running Beanie - Black
- Price
- £9.50
- Rating
- 4.5/5
- Reviews
- 30
- Age
- 3mo ago

Cooling Skull Caps Helmet Liner 2 Pcs Sweat Wicking Mesh Hard Hat Line Lightweight Running Beanie for Cycling Motorcycle Outdoor Work Black and Gray
- Price
- £6.01
- Rating
- 4.8/5
- Reviews
- 6
- Age
- 8mo ago

4 PCS Hard Hat Sweatband Belt Hard Hat Liner Washable Helmet Welding Antiperspirant Belt Accessories Cotton Comforter Pad Reusable Helmet Sweat Pads Accessories (Black)
- Price
- £7.72
- Rating
- 4.8/5
- Reviews
- 8
- Age
- 10mo ago

OTTERSHELL Single Pack and 2-Pack Breathable Mesh Skull Cap Lightweight Quick Dry Sports Helmet Liner for Men Women Cooling Cycling Beanies (Black - Hron)
- Price
- £6.69
- Rating
- 4.3/5
- Reviews
- 59
- Age
- 1y ago

OTTERSHELL Single Pack and 2-Pack Breathable Mesh Skull Cap Lightweight Quick Dry Sports Helmet Liner for Men Women Cooling Cycling Beanies (Blue - Skull + Orange Fire)
- Price
- £11.70
- Rating
- 4.3/5
- Reviews
- 59
- Age
- 1y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 27% of clicks, no more. An open shelf where new products get seen.
Brands
36 rising
Sellers
48
Est. top-5 brand share
60%
Top 20: 92%
Est. top-5 click share
27%
Top 20: 70%
Open market
40%
- MELASA12%
- EINSKEY12%
- French Fitness Revolution11%
- EMPIRELION10%
- WTACTFUL8%
- OTTERSHELL8%
Demand
Hard Hat Liner search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Jan, Feb, Nov, Dec · busiest ÷ quietest = 20.5×
Search terms
Top Hard Hat Liner search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- helmet liner10K/yr
- hard hat liner30K/yr
- jsp hard hat liner11K/yr
- under helmet hat4K/yr
Reviews and returns
What reviews say buyers love and hate about Hard Hat Liner
We read the reviews and the return reasons for every product selling here.
“too tight”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
17 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Hard Hat Liner questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data








