---
title: "Silk Long Underwear Mens — $12K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/silk-long-underwear-mens"
last_updated: "2026-08-06T04:18:58.331Z"
locale: en
meta:
description: "Niche score 33/100 · $12K/yr market · 60K searches/yr · $43.11 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 33/100 · $12K/yr market · 60K searches/yr · $43.11 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Silk Long Underwear Mens — $12K/yr Amazon US Niche (2026) - Flapen"
---
# **silk long underwear mens**
**Skip it**
Soft demand (-77.9% this quarter) — this niche doesn't clear our bar today.
Market size 3Growth 0Conversion 6Competition 62Returns 20Price range 95Avg price 95Brand share 29Review moat 45Quality gap 58
**Avg price**
**Incredible****$43.11**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$15.90–$74.66**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****48%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****1,996.68**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****88%**
top-5 brand share — brands hold most of the demand
**Returns**
**Bad****6.3%**
return rate — above 5% kills the launch gate
**Conversion**
**Bad****0.5%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****$12K**
$12K/yr · 60K searches
**Growth**
**Bad****-77.9%**
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 mens is a $12K/yr Amazon United States market (60K searches/yr). The top 5 brands hold 88% of demand. Demand peaks in Jan–Feb–Nov–Dec. Verdict: Skip it — 33/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **silk long underwear mens market data**
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$32K–$43K**
- units × avg price
- **Conversion rate**
- **0.5%**
- **Avg BSR**
- **#983**
- **Page quality**
- **0%**
- **Prime**
- **88%**
- **Sponsored**
- **85%**
- **Out of stock**
- **10.6%**
- **Avg brand age**
- **61 months**
- **Avg seller age**
- **168 days**
## **Competition & brand share**
The top 5 products take 48% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**12 **▲rising
**Sellers**
**19**
**Top-5 brand share**
**88%**
Top 20: 100%
**Top-5 click share**
**48%**
Top 20: 88%
**Open market**
**9%**
- Viamulion31% - Terramar23% - Grenasasilk22% - WEERTI8% - HMRICHNO14% - ZEEREE3% - Open — no brand owns it (6 brands, 9%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -77.9% search growth over the last 90 days.
5K4KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Nov, Dec · busiest ÷ quietest = 16.3×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/silk-long-underwear-mens/trend)
## **Top silk long underwear mens search terms**
- **silk long underwear mens**16K/yr-82.0%0.3% conv. - **mens silk long underwear**11K/yr-80.2%0.4% conv. - **silk thermal underwear men**8K/yr-77.0%0.8% conv. - **silk long johns for men**6K/yr-71.5%0.7% conv. - **silk base layer mens**4K/yr-58.8%0.5% conv. - **mens silk long johns**4K/yr-72.8%0.8% conv. - **mens silk long underwear bottoms**4K/yr-82.9%1.0% conv. - **silk long underwear for men**3K/yr-75.2%0.0% conv. - **silk thermals for men**3K/yr-84.1%0.0% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/silk-long-underwear-mens/search-terms)
## **Top silk long underwear mens 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%4%$4728%$94512%$1K16%$2K101001K10K100K 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**Grenasasilk Mens Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (XL Grey)**Grenasasilk**$67.85**4.4★516 rev](https://www.amazon.com/dp/B0CHY47F63) [2**100% Silk Thermasilk Filament Baselayer Bottom Pant**Terramar**$56.72**4.3★482 rev](https://www.amazon.com/dp/B000V5I81C) [3**Mens Pure Mulberry Silk Knitted Thermal Underwear Long Johns Bottom(Pants Only) Black**Viamulion**$41.00**4.3★99 rev](https://www.amazon.com/dp/B0B12KWWQP) [4**WEERTI Thermal Underwear for Men Long Johns with Fleece Lined Base Layer Men Cold Weather Top Bottom-Black L**WEERTI**$27.82**4.6★13,949 rev](https://www.amazon.com/dp/B088JYX7YN) [5**Mens Pure Mulberry Silk Knitted Thermal Underwear Long Johns Bottom(Pants Only) White**Viamulion**$41.26**4.3★99 rev](https://www.amazon.com/dp/B0B12KGT1P)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Men Ice Silk Thermal Bottoms Sports Elastic Breathable Underwear Leggings Pants Long Johns Grey**HMRICHNO1**$20.10**11 rev11mo ago](https://www.amazon.com/dp/B0FK4LNYC9) [**Viamulion Mens Pure Mulberry Silk Knitted Thermal Underwear SetGREY L**Viamulion**$74.66**21 rev1y ago](https://www.amazon.com/dp/B0DQ11BWQM) [**Viamulion Mens Pure Mulberry Silk Knitted Thermal Underwear SetWHITE L**Viamulion**$74.26**21 rev1y ago](https://www.amazon.com/dp/B0DQ145BBW) [**Viamulion Mens Pure Mulberry Silk Knitted Thermal Underwear SetBLACK L**Viamulion**$73.51**21 rev1y ago](https://www.amazon.com/dp/B0DQ11L34P) [**Mens Silk Base Layer Bottom Pants Mulberry Silk Lightweight Thermal Underwear Long Johns (US Alpha X-Large Regular Regular Black)**ZEEREE**$23.85**23 rev1y ago](https://www.amazon.com/dp/B0DPL3LRQ1)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Grenasasilk Mens Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (M Grey)**Grenasasilk**$66.13**4.4★**▲ 425%**](https://www.amazon.com/dp/B0CHY57MGK) [**Mens Silk Base Layer Bottom Pants Mulberry Silk Lightweight Thermal Underwear Long Johns (US Alpha X-Large Regular Regular Black)**ZEEREE**$23.85**4.2★**▲ 335%**](https://www.amazon.com/dp/B0DPL3LRQ1) [**Thermal Underwear for Men Winter Hunting Gear Sport Long Johns Base Layer Top and Bottom Set Midweight Army Green L**CL convallaria**$22.97**4.6★**▲ 241%**](https://www.amazon.com/dp/B08DR18YXM) [**Viamulion Mens Pure Mulberry Silk Knitted Thermal Underwear SetWHITE L**Viamulion**$74.26**4.8★**▲ 168%**](https://www.amazon.com/dp/B0DQ145BBW) [**Grenasasilk Mens Silk Long Johns Mulberry Silk Long Underwear V-Neck Breathable Thermal Underwear Sets & Undergarments (L Grey)**Grenasasilk**$66.37**4.4★**▲ 96%**](https://www.amazon.com/dp/B0CHY47VXS)
**~~View all trending →~~**
## **What buyers say about silk long underwear mens**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Warmth**29%
*“Soft material and keeps you warm”*
**Size-Overall**20%
*“Nice and snug”*
**Quality-Overall**10%
*“Excellent product”*
**Comfort-Overall**8%
*“Comfortable and accurately sized”*
**Value For Money**7%
*“Worth it”*
**Advertised Vs Actual Product**4%
*“As described”*
**Soft Feel**3%
*“Smooth as silk of course”*
**Material Quality**2%
*“comfortable and high-quality fabric”*
**Weather Proof**2%
*“These kept me pretty warm while I worked outdoors in the snow”*
**Weight Light**2%
*“not heavy”*
### **What buyers complain about **
**Size-Overall**21%
*“Sizes run a little bit bigger than expected”*
**Color**8%
*“Go for any color other than black if you're going to get some”*
**Warmth**6%
*“Needed these today so very unfortunate they won't keep anyone warm”*
**Material Quality**6%
*“Child size and unknown material”*
**Comfort-Overall**5%
*“the waist band is very uncomfortable”*
**Quality-Overall**5%
*“cheaply produced product”*
**Durability**4%
*“wont last more than 1 season”*
**Thickness**4%
*“Thicker than I expected”*
**Wrist Fit**3%
*“Ends do not wrap on wrists and legs”*
**Gap/Hole**3%
*“Flap does not stay closed”*
### **Top return reasons **
**Size-Overall**56%
**Length**5%
**Material Quality**5%
**Waist Fit**5%
**Chest Fit**5%
**Advertised Vs Actual Product**3%
**Thin**2%
**Value For Money**2%
**Warmth**2%
**Sleeve Fit**2%
## **Common questions**
- **Is silk long underwear mens profitable to sell on Amazon United States?**
- The niche generates $12K/yr across 34 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -77.9%. Flapen's verdict: Skip it (33/100).
- **How competitive is the silk long underwear mens niche?**
- 12 brands and 19 sellers compete. The top 5 products take 48% of clicks and top 5 brands hold 88% of demand.
- **What do buyers complain about in silk long underwear mens?**
- Top complaints mined from reviews: Size-Overall, Color, Warmth. The return rate is 6.3% — above our launch gate.
- **When does demand for silk long underwear mens peak?**
- Demand peaks in Jan–Feb–Nov–Dec; the busiest month runs 16.3× the quietest.
- **What does it cost to enter the silk long underwear mens niche?**
- Listings span $15.90–$74.66; the average listing price is $43.11 (sweet spot $15–$100). The average incumbent carries 1,997 reviews — the moat a new listing must climb.
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