---
title: "thinx period underwear — Niche Verdict: Skip it (39/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/clothing-shoes-jewelry/thinx-period-underwear"
last_updated: "2026-07-14T03:15:18.590Z"
locale: en
meta:
  description: "soft demand (-11.9% this quarter) — thinx period underwear doesn't clear our bar today."
  "og:description": "soft demand (-11.9% this quarter) — thinx period underwear doesn't clear our bar today."
  "og:title": "thinx period underwear — Niche Verdict: Skip it (39/100) | Amazon United States - Flapen"
---

Back to Flapen home

# **thinx period underwear**

**Skip it**

Soft demand (-11.9% this quarter) — this niche doesn't clear our bar today.

Market size 27Growth 19Conversion 21Competition 51Returns 39Price range 82Avg price 86Brand share 32Review moat 37Quality gap 45

**Avg price**

**Great****$19.24**

avg listing price — sweet spot $15–$100

**Price range**

**Great****$11.01–$35.07**

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

**Competition**

**Good****54%**

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

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Returns**

**Okay****4.3%**

return rate — above 6% kills the launch gate

**Review moat**

**Okay****2,826.04**

avg incumbent reviews — the moat a new listing must climb

**Brand share**

**Okay****86%**

top-5 brand share — brands hold most of the demand

**Market size**

**Okay****$113K**

$113K/yr · 345K searches

**Conversion**

**Bad****1.7%**

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

**Growth**

**Bad****-11.9%**

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

## **Competition**

The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.

**Brands**

**10 **▼falling

**Sellers**

**18**

**Top-5 brand share**

**86%**

**Open market**

**9%**

- Demifill27% - Mesachy22% - Hanes22% - Nalwort8% - INNERSY7% - Geronmine5% - Open — no brand owns it (4 brands, 9%)

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$11K20%$23K30%$34K40%$45K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 28 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Demifill Teen Girls Period Panties Juniors First Period Starter Underwear Soft Briefs 12-14Years](https://m.media-amazon.com/images/I/41qGhKkk2GL.jpg)**Demifill Teen Girls Period Panties Juniors First Period Starter Underwear Soft Briefs 12-14Years**Demifill**$21.19**4.4★4,942 rev](https://www.amazon.com/dp/B09N1F5YV3) [2![Mesachy Teens Girls Period Underwear Kids Period Panties Menstrual Leakproof Protective Underwear for Teens Cotton Briefs](https://m.media-amazon.com/images/I/411KozYilVL.jpg)**Mesachy Teens Girls Period Underwear Kids Period Panties Menstrual Leakproof Protective Underwear for Teens Cotton Briefs**Mesachy**$17.76**4.5★1,468 rev](https://www.amazon.com/dp/B0BWH9TDPM) [3![Hanes Girls Hipster Period Underwear Comfort Period. Panties Moderate Protection 6-Pack](https://m.media-amazon.com/images/I/41GYK6-bRrL.jpg)**Hanes Girls Hipster Period Underwear Comfort Period. Panties Moderate Protection 6-Pack**Hanes**$20.51**4.4★1,146 rev](https://www.amazon.com/dp/B0CVS6LBM9) [4![Nalwort Teen Girls Period Underwear Menstrual Period Panties Leak-Proof Cotton Protective Briefs Pack of 6(Multicolor-5 12-14 Years)](https://m.media-amazon.com/images/I/418t8LUw0zL.jpg)**Nalwort Teen Girls Period Underwear Menstrual Period Panties Leak-Proof Cotton Protective Briefs Pack of 6(Multicolor-5 12-14 Years)**Nalwort**$23.51**4.5★9,095 rev](https://www.amazon.com/dp/B07QK6PQRF) [5![Mesachy Teens Girls Period Underwear Kids Period Panties Menstrual Leakproof Protective Underwear for Teens Cotton Briefs](https://m.media-amazon.com/images/I/411KozYilVL.jpg)**Mesachy Teens Girls Period Underwear Kids Period Panties Menstrual Leakproof Protective Underwear for Teens Cotton Briefs**Mesachy**$21.42**4.5★1,468 rev](https://www.amazon.com/dp/B0BWHJF5WV)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Musort Period Underwear for Teens Heavy Flow High Absorbency Girls Menstrual Panties Cotton Leakproof Protective Briefs](https://m.media-amazon.com/images/I/31fHIzf3gzL.jpg)**Musort Period Underwear for Teens Heavy Flow High Absorbency Girls Menstrual Panties Cotton Leakproof Protective Briefs**Musort**$11.01**187 rev1y ago](https://www.amazon.com/dp/B0FH6M9FYV) [![Musort Period Underwear for Teens Heavy Flow High Absorbency Girls Menstrual Panties Cotton Leakproof Protective Briefs](https://m.media-amazon.com/images/I/41i7lYM++1L.jpg)**Musort Period Underwear for Teens Heavy Flow High Absorbency Girls Menstrual Panties Cotton Leakproof Protective Briefs**Musort**$12.79**187 rev1y ago](https://www.amazon.com/dp/B0FH6NLK11) [![JAHSIYI Period Underwear for Teens Girls Menstrual Panties Tween Leak Proof Undies Juniors Cotton Briefs Youth Panty Underpants Size 12 14 10-12 Age 13 Year Old Young](https://m.media-amazon.com/images/I/41FadcZMOBL.jpg)**JAHSIYI Period Underwear for Teens Girls Menstrual Panties Tween Leak Proof Undies Juniors Cotton Briefs Youth Panty Underpants Size 12 14 10-12 Age 13 Year Old Young**JAHSIYI**$18.20**165 rev1y ago](https://www.amazon.com/dp/B0D97BS58C) [![TIICHOO Period Panties for Teens Seamless Menstrual Leakproof Underwear for Girls 5-Pack(10-12 Years 2 Black/Beige/Pink/Green)](https://m.media-amazon.com/images/I/31-CEW6epTL.jpg)**TIICHOO Period Panties for Teens Seamless Menstrual Leakproof Underwear for Girls 5-Pack(10-12 Years 2 Black/Beige/Pink/Green)**TIICHOO**$35.07**69 rev1y ago](https://www.amazon.com/dp/B0DT4G3N89) [![INNERSY Girls Period Underwear for Teens Heavy Flow Panties Size 10-18 Hold 4 Tampons 3-Pack(L(12-14 yrs) Solid Black)](https://m.media-amazon.com/images/I/31DkImDd2rL.jpg)**INNERSY Girls Period Underwear for Teens Heavy Flow Panties Size 10-18 Hold 4 Tampons 3-Pack(L(12-14 yrs) Solid Black)**INNERSY**$22.84**94 rev1y ago](https://www.amazon.com/dp/B0DSMGLDBV)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![Demifill Teen Girls Period Panties Juniors First Period Starter Underwear Soft Briefs 8-10Years](https://m.media-amazon.com/images/I/41iBekR-KaL.jpg)**Demifill Teen Girls Period Panties Juniors First Period Starter Underwear Soft Briefs 8-10Years**Demifill**$25.12**4.4★**▲ 104%**](https://www.amazon.com/dp/B09N1GZRTG) [![Musort Period Underwear for Teens Heavy Flow High Absorbency Girls Menstrual Panties Cotton Leakproof Protective Briefs](https://m.media-amazon.com/images/I/41i7lYM++1L.jpg)**Musort Period Underwear for Teens Heavy Flow High Absorbency Girls Menstrual Panties Cotton Leakproof Protective Briefs**Musort**$12.79**4.6★**▲ 102%**](https://www.amazon.com/dp/B0FH6NLK11) [![Hanes Girls Period Underwear Comfort Period. Hipster Panty Moderate Protection Period Panties 4-Pack](https://m.media-amazon.com/images/I/41f6ez8QPGL.jpg)**Hanes Girls Period Underwear Comfort Period. Hipster Panty Moderate Protection Period Panties 4-Pack**Hanes**$12.81**4.6★**▲ 89%**](https://www.amazon.com/dp/B0B9NYGT9Z) [![Hanes Girls Hipster Period Underwear Comfort Period. Panties Moderate Protection 6-Pack](https://m.media-amazon.com/images/I/31HnhXsb-oL.jpg)**Hanes Girls Hipster Period Underwear Comfort Period. Panties Moderate Protection 6-Pack**Hanes**$20.92**4.4★**▲ 86%**](https://www.amazon.com/dp/B0CVS6ZWCB) [![Demifill Teen Girls Period Underwear Girls Cotton Briefs Soft Underwear For Teens 14Years Mixed Colour](https://m.media-amazon.com/images/I/31OyzkCyp6L.jpg)**Demifill Teen Girls Period Underwear Girls Cotton Briefs Soft Underwear For Teens 14Years Mixed Colour**Demifill**$16.28**4.4★**▲ 82%**](https://www.amazon.com/dp/B088KQM9WX)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — -11.9% search growth over the last 90 days.

35K25KPrime Day '24Spike '25Prime Day '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay

Peak months: Jul, Aug, Sep · busiest ÷ quietest = 3.8×

## **Reviews**

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

### **What buyers love **

**Comfort-Overall**25%

*“Super comfortable”*

**Quality-Overall**20%

*“These panties are very well made”*

**Size-Overall**15%

*“True to size and description”*

**Washability**5%

*“wash well too”*

**Thickness**4%

*“Nice and thick”*

**Value For Money**3%

*“Worth it”*

**Color**3%

*“Cute colors”*

**Soft Feel**3%

*“Value & Softness”*

**Durability**2%

*“Durable, easy to store”*

**Advertised Vs Actual Product**2%

*“As expected”*

### **What buyers complain about **

**Comfort-Overall**13%

*“Not comfortable”*

**Absorbency**12%

*“NOT ABSORBENT”*

**Size-Overall**12%

*“Sizing is tricky”*

**Functionality-Overall**10%

*“Do not work”*

**Thickness**7%

*“A little thicker than normal underwear”*

**Advertised Vs Actual Product**5%

*“False advertising”*

**Material Quality**4%

*“Poor quality material”*

**Value For Money**3%

*“Not worth it”*

**Allergies**3%

*“cause chafing on my daughter's skin”*

**Stiffness**3%

*“Very stiff material”*

### **Top return reasons **

**Size-Overall**69%

**Waist Fit**6%

**Material Quality**4%

**Advertised Vs Actual Product**3%

**Thin**3%

**Thigh Fit**2%

**Comfort-Overall**1%

**Absorbency**1%

**Length**1%

**Thickness**1%