---
title: "Silk Long Underwear Women — $253K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/silk-long-underwear-women"
last_updated: "2026-08-10T12:25:06.273Z"
locale: en
meta:
description: "Niche score 38/100 · $253K/yr market · 1.8M searches/yr · $33.51 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · $253K/yr market · 1.8M searches/yr · $33.51 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Silk Long Underwear Women — $253K/yr Amazon US Niche (2026) - Flapen"
---
# **silk long underwear women**
**Skip it**
Soft demand (-68.5% this quarter) — this niche doesn't clear our bar today.
Market size 47Growth 0Conversion 5Competition 94Returns 10Price range 86Avg price 95Brand share 27Review moat 29Quality gap 23
**Avg price**
**Incredible****$33.51**
avg listing price — sweet spot $15–$100
**Competition**
**Great****21%**
top-5 click share — an open shelf
**Price range**
**Great****$9.72–$56.25**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Okay****$253K**
$253K/yr · 1.8M searches
**Review moat**
**Okay****3,557.63**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****89%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Returns**
**Bad****9.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Bad****0.4%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-68.5%**
90-day search growth — must beat 0% to launch
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, silk long underwear women is a $253K/yr Amazon United States market (1.8M searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Jan–Feb–Nov–Dec. Verdict: Skip it — 38/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **silk long underwear women market data**
- **Units sold / yr**
- **8K–10K**
- avg 0–100/product
- **Revenue / yr**
- **$268K–$335K**
- units × avg price
- **Conversion rate**
- **0.4%**
- **Avg BSR**
- **#427**
- **Page quality**
- **0%**
- **Prime**
- **99%**
- **Sponsored**
- **93%**
- **Out of stock**
- **8.2%**
- **Avg brand age**
- **46 months**
- **Avg seller age**
- **139 days**
## **Competition & brand share**
Clicks spread well past the top 5 (21% combined) — an open shelf where new products get seen.
**Brands**
**21 **▲rising
**Sellers**
**99**
**Top-5 brand share**
**89%**
Top 20: 100%
**Top-5 click share**
**21%**
Top 20: 50%
**Open market**
**9%**
- Cuddl Duds72% - WEERTI7% - Ekouaer5% - COZYFIT3% - Findsweet2% - ENJOYNIGHT2% - Open — no brand owns it (15 brands, 9%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -68.5% search growth over the last 90 days.
13K8KPrime Day '24Spike '24Holiday '24Spike '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Nov, Dec · busiest ÷ quietest = 9.1×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/silk-long-underwear-women/trend)
## **Top silk long underwear women search terms**
- **cuddle duds women**645K/yr-73.7%0.3% conv. - **cuddle duds women pajamas**225K/yr-46.0%0.3% conv. - **cuddl duds**145K/yr-61.6%0.1% conv. - **cuddle duds**139K/yr-66.4%0.1% conv. - **cuddle duds womens tops**146K/yr-80.8%0.3% conv. - **cuddl duds pajamas**38K/yr-25.7%0.1% conv. - **cuddl duds women**75K/yr-80.0%0.3% conv. - **silk long underwear women**54K/yr-79.2%0.3% conv. - **cuddle duds women leggings**51K/yr-85.3%0.2% conv. - **cuddl duds pajamas set womens**15K/yr-8.4%0.2% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/silk-long-underwear-women/search-terms)
## **Top silk long underwear women 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%2%$5K4%$10K6%$15K8%$20K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**WEERTI Thermal Underwear for Women Long Johns with Fleece Lined Base Layer Women Cold Weather Top Bottom-Black M**WEERTI**$26.43**4.5★12,937 rev](https://www.amazon.com/dp/B088H5DWV3) [2**Cuddl Duds Womens Heavyweight Fleece 2 Piece Long Sleeve Thermal Underwear Set Shirt & Leggings Base Layer for Cold Weather Winter Clothing Long Johns Lounge Sets for Women Black M**Cuddl Duds**$34.25**4.7★6,365 rev](https://www.amazon.com/dp/B0BV8QGYDY) [3**Cuddl Duds Womens 2 Piece Pajamas & Lounge Set - Cozy Soft Long Sleeve Sleepwear & Loungewear - Button Down Sleep Shirt & Long Pajama Pants with Pockets PJs Sets for Women Floral Ditsy M**Cuddl Duds**$44.87**4.7★232 rev](https://www.amazon.com/dp/B0FLMPJVM3) [4**Cuddl Duds Womens Heavyweight Fleece 2 Piece Long Sleeve Thermal Underwear Set Shirt & Leggings Base Layer for Cold Weather Winter Clothing Long Johns Lounge Sets for Women Purple L**Cuddl Duds**$33.53**4.7★6,365 rev](https://www.amazon.com/dp/B0BV87W71L) [5**Cuddl Duds Womens 2 Piece Matching Pajamas & Lounge Set - Cozy Soft Loungewear & Sleepwear - Long Sleeve Crewneck Sleep Pajama Shirt & Long PJs Pants with Pockets Sets for Women Grey Hearts L**Cuddl Duds**$46.21**4.7★200 rev](https://www.amazon.com/dp/B0FLMVW9JV)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**COZYFIT Womens Underscrub Tee Comfort V-Neck Long Sleeve Undershirt with Soft & Easy Care Fabric Black**COZYFIT**$10.15**625 rev11mo ago](https://www.amazon.com/dp/B0FHVBDCRK) [**Cuddl Duds Womens 2 Piece Pajamas & Lounge Set - Cozy Soft Long Sleeve Sleepwear & Loungewear - Button Down Sleep Shirt & Long Pajama Pants with Pockets PJs Sets for Women Floral Ditsy M**Cuddl Duds**$44.87**232 rev11mo ago](https://www.amazon.com/dp/B0FLMPJVM3) [**Cuddl Duds Womens 2 Piece Matching Pajamas & Lounge Set - Cozy Soft Loungewear & Sleepwear - Long Sleeve Crewneck Sleep Pajama Shirt & Long PJs Pants with Pockets Sets for Women Grey Hearts L**Cuddl Duds**$46.21**200 rev11mo ago](https://www.amazon.com/dp/B0FLMVW9JV) [**Cuddl Duds Womens 2 Piece Matching Pajamas & Lounge Set - Cozy Soft Loungewear & Sleepwear - Long Sleeve Crewneck Sleep Pajama Shirt & Long PJs Pants with Pockets Sets for Women Blue Dots M**Cuddl Duds**$45.44**200 rev11mo ago](https://www.amazon.com/dp/B0FLMBXBCR) [**Cuddl Duds Womens 2 Piece Matching Pajamas & Lounge Set - Cozy Soft Loungewear & Sleepwear - Long Sleeve Crewneck Sleep Pajama Shirt & Long PJs Pants with Pockets Sets for Women Animal Print M**Cuddl Duds**$46.24**200 rev11mo ago](https://www.amazon.com/dp/B0FLMKHW3X)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Findsweet 2026 Pajamas Sets for Women Soft Sleeveless Pjs Tank Top and Pants with Pocket Ladies Loungewear Sets XL fl Pink Star**Findsweet**$13.86**4.8★**▲ 220%**](https://www.amazon.com/dp/B0DQ87X87Z) [**Cuddl Duds Womens 2 Piece Matching Pajamas & Lounge Set - Cozy Soft Loungewear & Sleepwear - Long Sleeve Crewneck Sleep Pajama Shirt & Long PJs Pants with Pockets Sets for Women Blue Dots M**Cuddl Duds**$45.44**4.7★**▲ 211%**](https://www.amazon.com/dp/B0FLMBXBCR) [**Cuddl Duds Womens 2 Piece Pajamas & Lounge Set - Cozy Soft Long Sleeve Sleepwear & Loungewear - Button Down Sleep Shirt & Long Pajama Pants with Pockets PJs Sets for Women Black Dot S**Cuddl Duds**$46.04**4.7★**▲ 145%**](https://www.amazon.com/dp/B0FLMF6Z4X) [**Cuddl Duds Womens 2 Piece Pajamas & Lounge Set - Cozy Soft Long Sleeve Sleepwear & Loungewear - Button Down Sleep Shirt & Long Pajama Pants with Pockets PJs Sets for Women Animal Print M**Cuddl Duds**$46.17**4.7★**▲ 120%**](https://www.amazon.com/dp/B0FLMPYMXG) [**Cuddl Duds Womens 2 Piece Pajamas & Lounge Set - Cozy Soft Long Sleeve Sleepwear & Loungewear - Button Down Sleep Shirt & Long Pajama Pants with Pockets PJs Sets for Women Floral Ditsy L**Cuddl Duds**$45.28**4.7★**▲ 119%**](https://www.amazon.com/dp/B0FLMBN5YY)
**~~View all trending →~~**
## **What buyers say about silk long underwear women**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Comfort-Overall**20%
*“And comfortable”*
**Warmth**16%
*“Toasty warm”*
**Size-Overall**16%
*“Fits as stated”*
**Soft Feel**15%
*“Soft cotton”*
**Quality-Overall**5%
*“are higher quality than I anticipated”*
**Material Quality**4%
*“Material comfy”*
**Value For Money**3%
*“they are affordable”*
**Color**3%
*“Color is vibrant”*
**Weight Light**2%
*“Lightweight and comfortable”*
**Washability**1%
*“Washed well”*
### **What buyers complain about **
**Size-Overall**28%
*“Runs very small”*
**Material Quality**4%
*“Cheap material”*
**Thickness**3%
*“It's not thick and bulky,”*
**Warmth**2%
*“Not a warm pair of pajamas”*
**Length**2%
*“pants way too short”*
**Quality-Overall**1%
*“It is Cheap quality”*
**Weight Heavy**1%
*“Bulky”*
**Smell**1%
*“Chemical odor overwhelming”*
**Waist Fit**1%
*“The pants are a bit tight in the waist though”*
**Value For Money**1%
*“A little expensive”*
### **Top return reasons **
**Size-Overall**56%
**Length**7%
**Material Quality**6%
**Waist Fit**6%
**Sleeve Fit**3%
**Color**2%
**Advertised Vs Actual Product**2%
**Thin**2%
**Thigh Fit**1%
**Chest Fit**1%
## **Common questions**
- **Is silk long underwear women profitable to sell on Amazon United States?**
- The niche generates $253K/yr across 99 tracked products. 3 of 41 products launched in the last 360 days are still selling. 90-day search growth is -68.5%. Flapen's verdict: Skip it (38/100).
- **How competitive is the silk long underwear women niche?**
- 21 brands and 99 sellers compete. The top 5 products take 21% of clicks and top 5 brands hold 89% of demand.
- **What do buyers complain about in silk long underwear women?**
- Top complaints mined from reviews: Size-Overall, Material Quality, Thickness. The return rate is 9.1% — above our launch gate.
- **When does demand for silk long underwear women peak?**
- Demand peaks in Jan–Feb–Nov–Dec; the busiest month runs 9.1× the quietest.
- **What does it cost to enter the silk long underwear women niche?**
- Listings span $9.72–$56.25; the average listing price is $33.51 (sweet spot $15–$100). The average incumbent carries 3,558 reviews — the moat a new listing must climb.
## **Related niches in Clothing, Shoes & Jewelry**
- 72 [**first communion gifts for boys**](https://flapen.com/research/us/clothing-shoes-jewelry/first-communion-gifts-for-boys)$398K/yr+223.5%**Worth a look**- 72 [**fifa world cup 2026 tshirt**](https://flapen.com/research/us/clothing-shoes-jewelry/fifa-world-cup-2026-tshirt)$177K/yr>1,000%**Worth a look**- 72 [**american flag hat**](https://flapen.com/research/us/clothing-shoes-jewelry/american-flag-hat)$764K/yr+428.8%**Worth a look**- 72 [**white socks men**](https://flapen.com/research/us/clothing-shoes-jewelry/white-socks-men)$3.0M/yr+13.3%**Launch it**- 72 [**american flag overalls**](https://flapen.com/research/us/clothing-shoes-jewelry/american-flag-overalls)$662K/yr>1,000%**Worth a look**- 73 [**white ankle socks for men**](https://flapen.com/research/us/clothing-shoes-jewelry/white-ankle-socks-for-men)$448K/yr+88.3%**Worth a look**[**All Clothing, Shoes & Jewelry niches **](https://flapen.com/research/us/clothing-shoes-jewelry)