Is crocs liner profitable to sell on Amazon United States?

The niche generates $9K/yr across 30 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is -29.7%. Flapen's verdict: Skip it (40/100).

How competitive is the crocs liner niche?

10 brands and 34 sellers compete. The top 5 products take 48% of clicks and top 5 brands hold 91% of demand.

What do buyers complain about in crocs liner?

Top complaints mined from reviews: Pain Relief-Overall, Size-Overall, Comfort-Overall. The return rate is 2.0%.

When does demand for crocs liner peak?

Demand peaks in Oct–Nov–Dec; the busiest month runs 5.2× the quietest.

What does it cost to enter the crocs liner niche?

Listings span $8.38–$55.43; the average listing price is $15.28 (sweet spot $15–$100). The average incumbent carries 4,389 reviews — the moat a new listing must climb.

crocs liner

Skip it

A small market ($9K/yr) — this niche doesn't clear our bar today.

Quality gap

Incredible3.9★

avg incumbent rating — lower means beatable quality

Price range

Great$8.38–$55.43

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

Avg price

Great$15.28

avg listing price — sweet spot $15–$100

Returns

Good2.0%

return rate — above 5% kills the launch gate

Competition

Good48%

top-5 click share — leaders hold, buyers still browse

Review moat

Bad4,388.9

avg incumbent reviews — the moat a new listing must climb

Brand share

Bad91%

top-5 brand share — brand-locked demand

Growth

Bad-29.7%

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

Conversion

Bad0.5%

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

Market size

Bad$9K

$9K/yr · 125K searches

Signals Quality Gap

According to Flapen's Amazon United States niche tracking, crocs liner is a $9K/yr Amazon United States market (125K searches/yr). The top 5 brands hold 91% of demand. Demand peaks in Oct–Nov–Dec. Verdict: Skip it — 40/100.

Data updated Jul 12, 2026 · scored weekly · How we score niches

crocs liner market data

Units sold / yr: 500–750; avg 0–100/product
Revenue / yr: $8K–$11K; units × avg price
Conversion rate: 0.5%
Avg BSR: #786
Page quality: 0%
Prime: 100%
Sponsored: 67%
Out of stock: 9.1%
Avg brand age: 35 months
Avg seller age: 147 days

Competition & brand share

The top 5 products take 48% of clicks — established leaders, but buyers still shop beyond them.

Brands

10 falling

Sellers

Top-5 brand share

91%

Top 20: 100%

Top-5 click share

48%

Top 20: 86%

Open market

Endoto70%
Knixmax10%
Crocs4%
Mirvosa4%
Holibanna3%
Velmitten3%
Open — no brand owns it (4 brands, 6%)

Demand & seasonality

Weekly Amazon search volume, last 75 weeks — -29.7% search growth over the last 90 days.

Peak months: Oct, Nov, Dec · busiest ÷ quietest = 5.2×

Open Trend

Top crocs liner search terms

croc inserts24K/yr -12.6%0.5% conv.
crocs inserts18K/yr -5.8%0.6% conv.
croc liners21K/yr -44.1%0.2% conv.
crocs liner17K/yr -36.5%0.4% conv.
crocs liners insert6K/yr -23.4%0.1% conv.
crocs removable liner4K/yr -15.0%0.4% conv.
croc liner5K/yr -46.7%0.4% conv.
crocs liners4K/yr -38.9%0.2% conv.
crocs fuzzy inserts5K/yr -49.4%0.3% conv.
croc fuzzy inserts7K/yr -65.3%0.0% conv.

All search terms

Top crocs liner 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Endoto Fuzzy Liner Inserts for Crocs Clog Replacement Warm Fur Fluffy Lining Socks for Croc(Color:Black Size:Men8/Women10)

Endoto$14.833.3★265 rev

Endoto Fuzzy Liner Inserts for Crocs Clog Replacement Warm Fur Fluffy Lining Socks for Croc(Color:Black Size:Men9/Women11)

Endoto$14.813.3★265 rev

Endoto Fuzzy Liner Inserts for Crocs Clog Replacement Warm Fur Fluffy Lining Socks for Croc(Color:Black Size:Men6/Women8)

Endoto$14.843.3★265 rev

Endoto Fuzzy Liner Inserts for Crocs Clog Replacement Warm Fur Fluffy Lining Socks for Croc(Color:Beige Size:Men12/Women14)

Endoto$14.723.5★186 rev

Endoto Fuzzy Liner Inserts for Crocs Clog Replacement Warm Fur Fluffy Lining Socks for Croc(Color:Grey Size:Men12/Women14)

Endoto$14.903.4★202 rev

Newest

by launch date

Mirvosa Comfort Insoles for Crocs Clogs - Soft and Breathable Shoe Insoles Designed for Crocs Clogs - Trim to Fit Insert with U Heel Cup for All Day Comfort (Dark Gray US M 7-7.5 / W 8.5-9)

Mirvosa$8.8633 rev

2mo ago

Mirvosa Comfort Insoles for Crocs Clogs - Soft and Breathable Shoe Insoles Designed for Crocs Clogs - Trim to Fit Insert with U Heel Cup for All Day Comfort (Dark Gray US M 6-6.5 / W 7.5-8)

Mirvosa$8.8133 rev

2mo ago

Knixmax Insoles for Crocs 1 Pair Comfort Replacement Clogs Inserts for Men Women Thin Arch Support Shoe Liners Breathable Wide Innersoles for Garden Clogs Mules Sneakers Grey EU 41-42

Knixmax$10.94279 rev

7mo ago

Knixmax Insoles for Crocs 1 Pair Comfort Replacement Clogs Inserts for Men Women Thin Arch Support Shoe Liners Breathable Wide Innersoles for Garden Clogs Mules Sneakers Black EU 38-39

Knixmax$11.96279 rev

7mo ago

DWTWLE 4D Cloud Insoles for Men and Women Insoles Men Super Soft Anti-Fatigue Shock Absorption Relieve Foot Pain (Black Men: US 7-11)

DWTWLE$9.795,859 rev

1y ago

What buyers say about crocs liner

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

What buyers love

Comfort-Overall35%

“Comfortable and supportive”

Size-Overall11%

“Well fitting shoes”

Value For Money9%

“Good value for the money”

Quality-Overall6%

“Excellent Product”

Warmth5%

“Warm well structured comfortsble”

Soft Feel4%

“The inside is super soft”

Pain Relief-Overall2%

“No pain”

Advertised Vs Actual Product2%

“As advertised”

Cushion2%

“They provide excellent cushioning”

Ease Of Use2%

“Easy to use”

What buyers complain about

Pain Relief-Overall10%

“Hurt feet”

Size-Overall9%

“Bit too small”

Comfort-Overall9%

“Not comfortable”

Thickness6%

“Way too thick”

Durability5%

“will rip easily”

Quality-Overall5%

“A bit cheaply made”

Advertised Vs Actual Product4%

“Did not work as described”

Cushion4%

“No padding”

Strength2%

“Not sturdy”

Value For Money2%

“Not worth it”

Top return reasons

Size-Overall30%

Feet Fit13%

Length8%

Advertised Vs Actual Product6%

Comfort-Overall5%

Thin4%

Width4%