---
title: "Union Suit — $39K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/union-suit"
last_updated: "2026-08-09T15:32:46.202Z"
locale: en
meta:
description: "Niche score 42/100 · $39K/yr market · 236K searches/yr · $32.37 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 42/100 · $39K/yr market · 236K searches/yr · $32.37 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Union Suit — $39K/yr Amazon US Niche (2026) - Flapen"
---
# **union suit**
**Skip it**
Soft demand (-74.6% this quarter) — this niche doesn't clear our bar today.
Market size 10Growth 0Conversion 6Competition 87Returns 18Price range 94Avg price 95Brand share 62Review moat 49Quality gap 75
**Avg price**
**Incredible****$32.37**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$14.15–$75.13**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Great****28%**
top-5 click share — an open shelf
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Good****68%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Okay****1,640.39**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Bad****7.0%**
return rate — above 5% kills the launch gate
**Market size**
**Bad****$39K**
$39K/yr · 236K searches
**Conversion**
**Bad****0.5%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-74.6%**
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, union suit is a $39K/yr Amazon United States market (236K searches/yr). The top 5 brands hold 68% of demand. Demand peaks in Jan–Nov–Dec. Verdict: Skip it — 42/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **union suit market data**
- **Units sold / yr**
- **1K–1K**
- avg 0–100/product
- **Revenue / yr**
- **$32K–$40K**
- units × avg price
- **Conversion rate**
- **0.5%**
- **Avg BSR**
- **#11,467**
- **Page quality**
- **0%**
- **Prime**
- **97%**
- **Sponsored**
- **78%**
- **Out of stock**
- **11.0%**
- **Avg brand age**
- **47 months**
- **Avg seller age**
- **186 days**
## **Competition & brand share**
Clicks spread well past the top 5 (28% combined) — an open shelf where new products get seen.
**Brands**
**30 **▲rising
**Sellers**
**50**
**Top-5 brand share**
**68%**
Top 20: 96%
**Top-5 click share**
**28%**
Top 20: 63%
**Open market**
**28%**
- Fruit of the Loom25% - Indera22% - Ekouaer10% - GYMAPE6% - Carhartt5% - August Alley4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -74.6% search growth over the last 90 days.
23K18KSpike '24Holiday '24Prime Day '25Spike '25Holiday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Nov, Dec · busiest ÷ quietest = 20.7×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/union-suit/trend)
## **Top union suit search terms**
- **union suit**69K/yr-64.9%0.3% conv. - **mens union suit**38K/yr-73.2%0.0% conv. - **union suit men**52K/yr-85.8%0.3% conv. - **union suit with flap**25K/yr-72.0%0.2% conv. - **union suits for men**5K/yr-44.0%0.4% conv. - **mens thermal underwear union suits**9K/yr-80.8%0.4% conv. - **red union suit**5K/yr-40.2%0.8% conv. - **union suit pajamas**5K/yr-36.7%0.0% conv. - **mens union suit with back flap**5K/yr-84.9%0.0% conv. - **thermal onesie men**7K/yr-90.9%0.5% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/union-suit/search-terms)
## **Top union suit 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%$7814%$2K6%$2K8%$3K101001K10K 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**Fruit of the Loom Mens Premium Thermal Union Suit Black Large**Fruit of the Loom**$28.06**4.5★3,872 rev](https://www.amazon.com/dp/B08DKK92DK) [2**Indera Mens Cotton Rib Knit Union Suit Red Large Tall**Indera**$33.71**4.4★3,212 rev](https://www.amazon.com/dp/B000VGX9MO) [3**Fruit of the Loom Mens Premium Thermal Union Suit Red Medium**Fruit of the Loom**$27.16**4.5★3,872 rev](https://www.amazon.com/dp/B08DKC1YCM) [4**Ekouaer Mens One Piece Pajama Thermal Full Button Union Suit Long Sleeve Onesie with Button Flap Red M**Ekouaer**$23.04**4.4★570 rev](https://www.amazon.com/dp/B0C9HDMLSX) [5**Carhartt Mens Midweight Cotton Blend Waffle Union Suit Black Medium**Carhartt**$66.29**4.3★2,540 rev](https://www.amazon.com/dp/B07MQXTT42)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**EEOST Adaptive Clothing for Men Anti-Strip Back-Zip Cotton Romper Elderly Care Onesie for Special Needs and Disabilities (Charcoal Grey M)**EEOST**$37.38**36 rev7mo ago](https://www.amazon.com/dp/B0G8MCLVYN) [**Fruit of the Loom Mens Premium Thermal Union Suit Black Large**Fruit of the Loom**$28.06**3,872 rev9mo ago](https://www.amazon.com/dp/B08DKK92DK) [**Fruit of the Loom Mens Premium Thermal Union Suit Red Medium**Fruit of the Loom**$27.16**3,872 rev9mo ago](https://www.amazon.com/dp/B08DKC1YCM) [**Fruit of The Loom Mens Premium Thermal Union Suit Oatmeal X-Large**Fruit of the Loom**$27.05**3,872 rev9mo ago](https://www.amazon.com/dp/B08DK36VMN) [**Fruit of The Loom Mens Premium Thermal Union Suit Oatmeal Medium**Fruit of the Loom**$26.58**3,872 rev9mo ago](https://www.amazon.com/dp/B08DKCGFNN)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Ekouaer Mens One Piece Pajama Thermal Full Button Union Suit Long Sleeve Onesie with Button Flap Navy Blue M**Ekouaer**$24.24**4.4★**▲ 529%**](https://www.amazon.com/dp/B0D1FP6K4F) [**WORK IDEA Mens Coveralls Long Sleeve 100% Cotton Twill Workwear Jumpsuit Relaxed Fit Black L**WORK IDEA**$36.20**4.0★**▲ 477%**](https://www.amazon.com/dp/B0FCM8HD3Z) [**Gertex Adult Lightweight Back-Zip Sleeper (Medium Heather Grey)**Gertex**$53.64**4.2★**▲ 473%**](https://www.amazon.com/dp/B0DZ8S7TR9) [**EEOST Adaptive Clothing for Men Anti-Strip Back-Zip Cotton Romper Elderly Care Onesie for Special Needs and Disabilities (Charcoal Grey M)**EEOST**$37.38**3.7★**▲ 456%**](https://www.amazon.com/dp/B0G8MCLVYN) [**August Alley Mens Thermal Union Suits Long Sleeve One Piece Crew Neck Bodysuit Pajamas Button Down Classic Underwear(Khaki Large)**August Alley**$31.08**4.0★**▲ 436%**](https://www.amazon.com/dp/B0FPMSZM2G)
**~~View all trending →~~**
## **What buyers say about union suit**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Warmth**21%
*“Comfy and warm”*
**Size-Overall**20%
*“Nice and snug”*
**Comfort-Overall**11%
*“Extremely comfortable”*
**Quality-Overall**9%
*“Solid build quality”*
**Value For Money**8%
*“Good value”*
**Soft Feel**4%
*“I like it, size is accurate and is soft”*
**Advertised Vs Actual Product**3%
*“Exactly what I ordered it was perfect”*
**Material Quality**3%
*“The material is great, very thick and warm,”*
**Weight Light**3%
*“not heavy”*
**Ease Of Cleaning**1%
*“my hatsune miku shirt stays clean”*
### **What buyers complain about **
**Size-Overall**23%
*“way oversized”*
**Thickness**6%
*“They are about as thin as you can get”*
**Comfort-Overall**6%
*“Uncomfortable”*
**Weight Light**4%
*“Its a cheap lightweight material”*
**Arm Fit**3%
*“The legs, arms and torso are too long”*
**Gap/Hole**3%
*“Theres a hole in the back”*
**Wrist Fit**3%
*“Ends do not wrap on wrists and legs”*
**Color**3%
*“Go for any color other than black if you're going to get some”*
**Material Quality**3%
*“They feel like cheap leggings”*
**Value For Money**2%
*“Way too expensive for what you get”*
### **Top return reasons **
**Size-Overall**54%
**Length**7%
**Material Quality**5%
**Chest Fit**4%
**Waist Fit**4%
**Thin**3%
**Advertised Vs Actual Product**2%
**Sleeve Fit**2%
**Thigh Fit**2%
**Warmth**2%
## **Common questions**
- **Is union suit profitable to sell on Amazon United States?**
- The niche generates $39K/yr across 79 tracked products. 0 of 22 products launched in the last 360 days are still selling. 90-day search growth is -74.6%. Flapen's verdict: Skip it (42/100).
- **How competitive is the union suit niche?**
- 30 brands and 50 sellers compete. The top 5 products take 28% of clicks and top 5 brands hold 68% of demand.
- **What do buyers complain about in union suit?**
- Top complaints mined from reviews: Size-Overall, Thickness, Comfort-Overall. The return rate is 7.0% — above our launch gate.
- **When does demand for union suit peak?**
- Demand peaks in Jan–Nov–Dec; the busiest month runs 20.7× the quietest.
- **What does it cost to enter the union suit niche?**
- Listings span $14.15–$75.13; the average listing price is $32.37 (sweet spot $15–$100). The average incumbent carries 1,640 reviews — the moat a new listing must climb.
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