Is split top king mattress protector profitable to sell on Amazon United States?

The niche generates $63K/yr across 12 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -6.2%. Flapen's verdict: Skip it (39/100).

How competitive is the split top king mattress protector niche?

7 brands and 9 sellers compete. The top 5 products take 73% of clicks and top 5 brands hold 96% of demand.

What do buyers complain about in split top king mattress protector?

Top complaints mined from reviews: Water Resistance, Leak-Proof, Size-Overall. The return rate is 1.5%.

What does it cost to enter the split top king mattress protector niche?

Listings span $27.46–$71.17; the average listing price is $46.98 (sweet spot $15–$100). The average incumbent carries 9,827 reviews — the moat a new listing must climb.

split top king mattress protector

Skip it

Brand-locked demand (top 5 brands take 96% of clicks) — this niche doesn't clear our bar today.

Price range

Incredible$27.46–$71.17

cheapest to priciest tracked listing — scored on the share inside $15–$100

Avg price

Great$46.98

avg listing price — sweet spot $15–$100

Returns

Great1.5%

return rate — above 5% kills the launch gate

Conversion

Good6.1%

search→purchase rate — share of searches ending in a sale

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Competition

Bad73%

top-5 click share — a locked-up shelf

Growth

Bad-6.2%

90-day search growth — must beat 0% to launch

Review moat

Bad9,827.33

avg incumbent reviews — the moat a new listing must climb

Market size

Bad$63K

$63K/yr · 22K searches

Brand share

Bad96%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, split top king mattress protector is a $63K/yr Amazon United States market (22K searches/yr). The top 5 brands hold 96% of demand. Verdict: Skip it — 39/100.

Data updated Jul 29, 2026 · scored weekly · How we score niches

split top king mattress protector market data

Units sold / yr: 1K–2K; avg 0–100/product
Revenue / yr: $59K–$70K; units × avg price
Conversion rate: 6.1%
Avg BSR: #86
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 6.3%
Avg brand age: 60 months
Avg seller age: 184 days

Competition & brand share

The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.

Brands

7 falling

Sellers

Top-5 brand share

96%

Top 20: 100%

Top-5 click share

73%

Top 20: 100%

Open market

Kingnex63%
Moonsea11%
SPRINGSPIRIT11%
BEDLORE6%
KUTUU5%
Coldwind2%
Open — no brand owns it (1 brand, 2%)

Demand

Weekly Amazon search volume, last 26 weeks — -6.2% search growth over the last 90 days.

Open Trend

Top split top king mattress protector search terms

split top king mattress protector10K/yr -4.1%7.4% conv.
split head king mattress protector5K/yr -20.2%6.2% conv.
sleep number mattress pad4K/yr +3.8%2.1% conv.
mattress covers sleep number3K/yr +1.5%0.9% conv.

All search terms

Top split top king mattress protector 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 12 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Kingnex Waterproof Split Top King Mattress Protector Pad for Adjustable Bed

Kingnex$58.264.6★1,556 rev

Kingnex Waterproof Split Top King Mattress Protector for Adjustable Bed

Kingnex$41.304.6★7,028 rev

Bamboo Viscose Cooling Split Top King Mattress Protector for Adjustable Bed with Upper Flex Waterproof Fitted Sheet Style Matress Cover 32-34 Split from Head

Kingnex$58.684.5★720 rev

Split Top King Mattress Protector Pad Waterproof Cover for Adjustable Bed

SPRINGSPIRIT$57.424.6★18,038 rev

Split Head King Size Mattress Protector Waterproof for Adjustable Bed 34 Top Split from Head Smooth Top Breathable Skin Friendly and Noiseless Fitted Sheet Viscose Terry Mattress Cover

Moonsea$28.084.4★1,021 rev

Newest

by launch date

KUTUU Split King Mattress Protector for Adjustable Bed Cooling and Breathable Bamboo Viscose Waterproof Split Top King Mattress Pad Cover with 6-18 inches Deep Pocket 32-34 inches Split from Head

KUTUU$71.1733 rev

7mo ago

Split Top King Mattress Protector 34 Top Split from Head 7880

SPRINGSPIRIT$28.3017,914 rev

9mo ago

Split Top King Mattress Pad Waterproof Protector White (Cover Only)

Coldwind$57.861,615 rev

1y ago

Split Top King Mattress Protector Pad Waterproof Cover for Adjustable Bed

SPRINGSPIRIT$57.4218,038 rev

2y ago

Split Head King Size Mattress Protector Waterproof for Adjustable Bed 34 Top Split from Head Smooth Top Breathable Skin Friendly and Noiseless Fitted Sheet Viscose Terry Mattress Cover

Moonsea$28.081,021 rev

2y ago

What buyers say about split top king mattress protector

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall17%

“Decent quality”

Size-Overall17%

“fit snug”

Comfort-Overall10%

“Its comfortable and it breathes well”

Soft Feel9%

“Is soft”

Value For Money7%

“Great Buy”

Water Resistance5%

“Water proof”

Advertised Vs Actual Product4%

“As described”

Foam3%

“Nice mattress pad”

Washability2%

“theyre easy to wash”

Noise Level2%

“it is quiet”

What buyers complain about

Water Resistance28%

“Not even water resistant”

Leak-Proof7%

“it leaked”

Size-Overall6%

“Didn't fit”

Quality-Overall5%

“Cheap quality mattress cover”

Thickness3%

“Toilet paper at a rest area is thicker”

Moist/Dry3%

“then tumbled dry”

Durability3%

“when you try to pull it apart rips apart”

Advertised Vs Actual Product3%

“Description is inaccurate”

Functionality-Overall2%

“Did not work”

Stretchability/Expandability/Elasticity2%

“The elasticity of this is so BAD that it the pad will no stay in place”

Top return reasons

Size-Overall30%

Material Quality9%

Advertised Vs Actual Product8%

Value For Money5%

Noise Level4%

Thin4%

Breathability3%

Cushion3%

Water Resistance3%

Comfort-Overall3%

Common questions

Is split top king mattress protector profitable to sell on Amazon United States?: The niche generates $63K/yr across 12 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -6.2%. Flapen's verdict: Skip it (39/100).
How competitive is the split top king mattress protector niche?: 7 brands and 9 sellers compete. The top 5 products take 73% of clicks and top 5 brands hold 96% of demand.
What do buyers complain about in split top king mattress protector?: Top complaints mined from reviews: Water Resistance, Leak-Proof, Size-Overall. The return rate is 1.5%.
What does it cost to enter the split top king mattress protector niche?: Listings span $27.46–$71.17; the average listing price is $46.98 (sweet spot $15–$100). The average incumbent carries 9,827 reviews — the moat a new listing must climb.