duvet insert king
Worth a lookShows a $4.6M/yr market, but a deep review moat (30,492 avg reviews) keeps it on the watch list.
Market size
Incredible$4.6M$4.6M/yr · 1.4M searches
Avg price
Great$65.57avg listing price — sweet spot $15–$100
Conversion
Good4.9%search→purchase rate — share of searches ending in a sale
Returns
Good2.9%return rate — above 5% kills the launch gate
Price range
Good$26.50–$169.45cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Okay58%top-5 click share — leaders hold, buyers still browse
Brand share
Okay81%top-5 brand share — brands hold most of the demand
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Growth
Bad-9.5%90-day search growth — must beat 0% to launch
Review moat
Bad30,491.91avg incumbent reviews — the moat a new listing must climb
According to Flapen's Amazon United States niche tracking, duvet insert king is a $4.6M/yr Amazon United States market (1.4M searches/yr). The top 5 brands hold 81% of demand. Demand peaks in Nov. Verdict: Worth a look — 50/100.
Data updated Jul 18, 2026 · scored weekly · How we score niches
duvet insert king market data
- Units sold / yr
- 60K–80K
- avg 4,000–5,000/product
- Revenue / yr
- $3.9M–$5.2M
- units × avg price
- Conversion rate
- 4.9%
- Avg BSR
- #25
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 95%
- Out of stock
- 0.0%
- Avg brand age
- 54 months
- Avg seller age
- 193 days
Competition & brand share
The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.Brands
14 rising
Sellers
22
Top-5 brand share
81%
Top 20: 100%
Top-5 click share
58%
Top 20: 98%
Open market
14%
- Utopia Bedding32%
- Bedsure21%
- L LOVSOUL12%
- Amazon Basics11%
- EASELAND6%
- DOWNCOOL4%
- Open — no brand owns it (8 brands, 14%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -9.5% search growth over the last 90 days.Peak months: Nov · busiest ÷ quietest = 1.7×
Top duvet insert king search terms
- duvet insert king480K/yr
- king duvet insert429K/yr
- king size duvet insert160K/yr
- goose down comforter king size73K/yr
- duvet insert king size45K/yr
- king duvet insert fluffy31K/yr
- king duvet insert cooling20K/yr
- down duvet insert king29K/yr
- down blanket king31K/yr
- cooling duvet insert king14K/yr
Top duvet insert king 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.
All 22 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Utopia Bedding King Comforter Duvet Insert Quilted White Comforter with Corner Tabs Box Stitched Down Alternative Comforters King Size 90 x 102 inches
Utopia Bedding$36.374.6★155,570 rev
Utopia Bedding White Comforter King Size Duvet Insert Down Alternative Comforter
Utopia Bedding$30.524.6★126,601 rev
Bedsure Comforter Duvet Insert - Quilted Comforters King Size All Season Duvet GentleSoft Down Alternative Bedding Blanket with 8 Tabs Gifts for Women/Men White King 90 x 102 Inches
Bedsure$47.994.7★76,669 rev
L LOVSOUL Down Alternative Comforter King Size Duvet Insert All Season Duvet Insert with Corner Tabs White Comforter King 106x90Inches
L LOVSOUL$31.754.6★9,733 rev
EASELAND King Size Down Alternative Comforter - Quilted Duvet Insert for All Seasons Soft Lightweight with Corner Tabs Summer Winter Warm Bedding White 90x102 Inches
EASELAND$44.684.6★41,382 rev
Newest
by launch date
Martha Stewart Luxury White Goose Feathers Down Fiber Duvet Insert King Size - Hotel Collection 100% Cotton Cover Comforter All Season Medium Warmth Breathable Hypoallergenic 106 x 90 Inch
Martha Stewart$78.2847 rev
Breathable Goose Down Fiber Comforter King Size 106x90 Luxury Hotel Duvet Insert King All Season Fluffy Comforter Ideal for Couples & Families Who Share Their Bed with Pets Or Young Children
OASWET$142.2681 rev
L LOVSOUL Goose Feather Down Fiber Comforter King Size 100% Organic Cotton Fabric Duvet Insert 1200TC 750+FP Hotel Collection All Season White Bedding Comforters with 8 Tabs
L LOVSOUL$95.702,790 rev
Pacific Coast Goose Feather Down Fiber Comforters King Size Extra Fluffy White Duvet Insert Ultra-Soft Breathable All Season Hotel Luxury Bedding Comforters 8 Corner & Center Loops (106x90)
Pacific Coast$169.45932 rev
Hotel Grand Luxury White Goose Feather Down Fiber Comforter King Size 100% Cotton All Season Duvet Insert King Fluffy Medium Warmth Bedding Comforter with 8 Corner Loops White 106x90 Inch
Hotel Grand$71.35806 rev
Trending
90-day click momentumMartha Stewart Luxury White Goose Feathers Down Fiber Duvet Insert King Size - Hotel Collection 100% Cotton Cover Comforter All Season Medium Warmth Breathable Hypoallergenic 106 x 90 Inch
Martha Stewart$78.284.6★
Amazon Basics White Down Alternative Comforter and Duvet Insert with Corner Tabs Machine Washable King All-Season 102 x 90 inches
Amazon Basics$26.644.7★
Utopia Bedding Comforters King Size All Season Duvet Insert Down Alternative King Comforter with Corner Tabs Machine Washable Bed Comforter 90 x 102 Inches (White)
Utopia Bedding$29.044.6★
Luxurious King/California King Size Goose Down Fiber Waterfowl Feather Fiber Comforter Duvet 100% Cotton Cover 58 oz. Fill Weight Baffle Box Design White Solid
EGYPTIAN BEDDING$154.124.4★
Bedsure Comforter Duvet Insert - Quilted Comforters Queen Size All Season Duvet GentleSoft Down Alternative Bedding Blanket with 8 Tabs Gifts for Women/Men White Queen 88 x 88 Inches
Bedsure$31.324.7★
What buyers say about duvet insert king
What buyers praise and complain about, mined from review topics.What buyers love
“Love the comfort”
“Comfortable and warm”
“Great quality, its a cool white color”
“Extremely soft”
“Lightweight for sure”
“Very affordable”
“Perfect Fit”
“It's very cozy, soft, and fluffy”
“As advertised”
“Great thickness”
What buyers complain about
“it was too big”
“Awful quality”
“Not thick as advertised”
“its definitely NOT fluffy”
“Runs hot”
“making it uncomfortable to sleep with through the night”
“ALL SEASON IS TOO WARM”
“not as described”
“While this is a bit expensive”
“this smell is rancid”
Top return reasons
Common questions
- Is duvet insert king profitable to sell on Amazon United States?
- The niche generates $4.6M/yr across 22 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -9.5%. Flapen's verdict: Worth a look (50/100).
- How competitive is the duvet insert king niche?
- 14 brands and 22 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 81% of demand.
- What do buyers complain about in duvet insert king?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Thickness. The return rate is 2.9%.
- When does demand for duvet insert king peak?
- Demand peaks in Nov; the busiest month runs 1.7× the quietest.
- What does it cost to enter the duvet insert king niche?
- Listings span $26.50–$169.45; the average listing price is $65.57 (sweet spot $15–$100). The average incumbent carries 30,492 reviews — the moat a new listing must climb.