---
title: "Mens Trunk Underwear — $9K/mo Amazon US Product Research"
canonical_url: "https://flapen.com/research/us/clothing-shoes-jewelry/mens-trunk-underwear"
last_updated: "2026-08-12T08:24:17.556Z"
locale: en
meta:
description: "Amazon product research for mens trunk underwear: $9K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for mens trunk underwear: $9K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Mens Trunk Underwear — $9K/mo Amazon US Product Research"
---
# **Mens Trunk Underwear**
**Worth a look**
Shows a sweet-spot price point ($29.99 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 26Growth 27Conversion 10Competition 94Returns 76Price range 87Avg price 95Brand share 85Review moat 22Quality gap 62
**Avg price**
**Incredible****$29.99**
avg listing price — sweet spot $15–$100
**Competition**
**Great****21%**
top-5 click share — an open shelf
**Price range**
**Great****$10.19–$59.26**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Great****50%**
top-5 brand share — no brand owns this niche
**Returns**
**Great****2.0%**
return rate — above 5% kills the launch gate
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Growth**
**Okay****+1.9%**
90-day search growth — must beat 0% to launch
**Market size**
**Okay****$109K**
$109K/yr · 442K searches
**Review moat**
**Bad****10,066.67**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Bad****0.8%**
search→purchase rate — share of searches ending in a sale
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
## **Is mens trunk underwear profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, mens trunk underwear is a $109K/yr Amazon United States market (442K searches/yr). The top 5 brands hold 50% of demand. Verdict: Worth a look — 56/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **mens trunk underwear market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **4K–5K**
- avg 0–100/product
- **Revenue / yr**
- **$120K–$150K**
- units × avg price
- **Conversion rate**
- **0.8%**
- **Avg BSR**
- **#174**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **90%**
- **Out of stock**
- **0.8%**
- **Avg brand age**
- **46 months**
- **Avg seller age**
- **134 days**
## **Competition: brands, sellers & click share**
Clicks spread well past the top 5 (21% combined) — an open shelf where new products get seen.
**Brands**
**33 **▲rising
**Sellers**
**97**
**Top-5 brand share**
**50%**
Top 20: 93%
**Top-5 click share**
**21%**
Top 20: 51%
**Open market**
**44%**
- BAMBOO COOL16% - Calvin Klein10% - wirarpa10% - DAVID ARCHY7% - youlehe6% - Fruit of the Loom6%
## **mens trunk underwear demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +1.9% search growth over the last 90 days.
13K8KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/us/clothing-shoes-jewelry/mens-trunk-underwear/trend)
## **Top mens trunk underwear search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **mens trunks underwear**204K/yr-12.9%0.6% conv. - **mens trunk underwear**53K/yr+40.1%0.7% conv. - **mens underwear trunks**68K/yr+19.4%0.7% conv. - **men trunks underwear**22K/yr-4.0%0.6% conv. - **boxer trunks for men**17K/yr+18.3%0.5% conv. - **mens boxer trunks**16K/yr+6.7%0.4% conv. - **trunks underwear**8K/yr+64.6%0.6% conv. - **mens underwear trunk**8K/yr+10.7%1.0% conv. - **men underwear trunks**8K/yr-4.4%0.4% conv. - **trunk underwear**7K/yr+21.3%0.4% conv. [**All search terms **](https://flapen.com/research/us/clothing-shoes-jewelry/mens-trunk-underwear/search-terms)
## **Top mens trunk underwear products & what they sell for**
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%2%$2K4%$4K6%$7K8%$9K101001K10K100K 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**Mens Bamboo Underwear 4-Pack - Ultra Soft Anti-Roll Waistband Tagless Trunks**BAMBOO COOL**$33.81**4.1★84 rev](https://www.amazon.com/dp/B0DYSBFT2B) [2**LuxeCore Mens Breathable Boxer Briefs 10 Pack Moisture Wicking Quick-Dry Underwear Comfortable Stretch Waistband Multipack(M) Multicolor**LuxeCore**$20.04**4.2★136 rev](https://www.amazon.com/dp/B0FD8RPB98) [3**wirarpa Mens Breathable Micro Modal Trunk Underwear Covered Waistband Microfiber Underpants Short Leg Solid Color Large**wirarpa**$22.49**4.4★25,653 rev](https://www.amazon.com/dp/B0749DXV7X) [4**Fruit of the Loom Mens 4-Way Stretch Boxer Briefs | Lightweight & Moisture Wicking Underwear | Long Regular Leg & Trunk Trunk - 6 Pack - Assorted Solids Large**Fruit of the Loom**$19.66**4.2★83 rev](https://www.amazon.com/dp/B0FKTNL1SH) [5**SOLY HUX Mens Boxer Briefs 3 Packs Trunks Mid Rise Underwear Stretchy Knitted Panties Green Black Multi Medium**SOLY HUX**$20.07**4.2★233 rev](https://www.amazon.com/dp/B0F1TG1H2Q)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**HOOFESAN Mens Underwear Boxer Briefs Soft Breathable Trunks Underwear No Ride Up Boxer Briefs for Men Multipack**HOOFESAN**$20.32**29 rev8mo ago](https://www.amazon.com/dp/B0G3H15CXP) [**adidas Mens Microfiber Trunk Briefs (3-Pack) Performance Stretch Moisture-Wicking Underwear**adidas**$25.56**318 rev8mo ago](https://www.amazon.com/dp/B0F3WYW71J) [**Fruit of the Loom Mens 4-Way Stretch Boxer Briefs | Lightweight & Moisture Wicking Underwear | Long Regular Leg & Trunk Trunk - 6 Pack - Assorted Solids Large**Fruit of the Loom**$19.66**83 rev11mo ago](https://www.amazon.com/dp/B0FKTNL1SH) [**LuxeCore Mens Breathable Boxer Briefs 10 Pack Moisture Wicking Quick-Dry Underwear Comfortable Stretch Waistband Multipack(M) Multicolor**LuxeCore**$20.04**136 rev1y ago](https://www.amazon.com/dp/B0FD8RPB98) [**Arjen Kroos Breathable Cotton Underwear for Men 4 Pack Moisture Wicking Anti-Roll Trunks Underpants with Plush Waistband**Arjen Kroos**$29.79**76 rev1y ago](https://www.amazon.com/dp/B0FC5N3FBJ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Arjen Kroos Breathable Cotton Underwear for Men 4 Pack Moisture Wicking Anti-Roll Trunks Underpants with Plush Waistband**Arjen Kroos**$29.79**4.5★**▲ 57%**](https://www.amazon.com/dp/B0FC5N3FBJ) [**DAVID ARCHY Mens Trunks Underwear Soft Breathable Rayon Made from Bamboo Trunk No Fly Pouch 4-Pack L 2.5**DAVID ARCHY**$30.10**4.3★**▲ 56%**](https://www.amazon.com/dp/B01C541372) [**HOOFESAN Mens Underwear Boxer Briefs Soft Breathable Trunks Underwear No Ride Up Boxer Briefs for Men Multipack**HOOFESAN**$20.32**4.4★**▲ 53%**](https://www.amazon.com/dp/B0G3H15CXP) [**Mens Bamboo Underwear 4-Pack - Ultra Soft Anti-Roll Waistband Tagless Trunks**BAMBOO COOL**$33.81**4.1★**▲ 52%**](https://www.amazon.com/dp/B0DYSBFT2B) [**BAMBOO COOL Mens Trunks Underwear Performance Breathable Mesh Fly Zone Moisture-Wicking(7 Pack)**BAMBOO COOL**$54.97**4.6★**▲ 47%**](https://www.amazon.com/dp/B0DQCLRNS2)
**~~View all trending →~~**
## **What reviews say buyers love and hate about mens trunk underwear**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Comfort-Overall**23%
*“Comfortable to wear”*
**Size-Overall**19%
*“not too tight”*
**Quality-Overall**11%
*“Decent Quality”*
**Value For Money**6%
*“They are affordable”*
**Soft Feel**6%
*“soft on the skin”*
**Material Quality**4%
*“Very breathable material”*
**Breathability**4%
*“Breathes well”*
**Advertised Vs Actual Product**3%
*“Exactly as pictured”*
**Color**2%
*“colors are nice”*
**Stretchability/Expandability/Elasticity**1%
*“stretchy fabric”*
### **What buyers complain about **
**Size-Overall**21%
*“Too short”*
**Quality-Overall**9%
*“not well-made”*
**Comfort-Overall**6%
*“Extremely uncomfortable”*
**Stretchability/Expandability/Elasticity**6%
*“no elasticity”*
**Durability**4%
*“Fell apart immediately”*
**Thigh Fit**4%
*“Very tight in the thigh”*
**Material Quality**4%
*“Material a bit stiff”*
**Waist Fit**3%
*“even though the waist wasnt even close to too tight”*
**Value For Money**2%
*“Price is too high”*
**Gap/Hole**2%
*“Two pair had dime size hole in them”*
### **Top return reasons **
**Size-Overall**44%
**Waist Fit**11%
**Thigh Fit**9%
**Material Quality**9%
**Length**8%
**Advertised Vs Actual Product**3%
**Comfort-Overall**2%
**Shape/Style**2%
**Quality-Overall**1%
**Thin**1%
## **Common mens trunk underwear questions**
- **Is mens trunk underwear profitable to sell on Amazon United States?**
- The niche generates $109K/yr across 110 tracked products. 11 of 19 products launched in the last 360 days are still selling. 90-day search growth is +1.9%. Flapen's verdict: Worth a look (56/100).
- **How competitive is the mens trunk underwear niche?**
- 33 brands and 97 sellers compete. The top 5 products take 21% of clicks and top 5 brands hold 50% of demand.
- **What do buyers complain about in mens trunk underwear?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Comfort-Overall. The return rate is 2.0%.
- **When does demand for mens trunk underwear peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the mens trunk underwear niche?**
- Listings span $10.19–$59.26; the average listing price is $29.99 (sweet spot $15–$100). The average incumbent carries 10,067 reviews — the moat a new listing must climb.
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