---
title: "Polaris 3900 Bag — $12K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/polaris-3900-bag"
last_updated: "2026-08-10T21:14:25.094Z"
locale: en
meta:
description: "Niche score 52/100 · $12K/yr market · 4K searches/yr · $23.06 avg price. A small market ($12K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 52/100 · $12K/yr market · 4K searches/yr · $23.06 avg price. A small market ($12K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Polaris 3900 Bag — $12K/yr Amazon US Niche (2026) - Flapen"
---
# **polaris 3900 bag**
**Worth a look**
Shows searches that convert (13.5% search→purchase), but a small market ($12K/yr) keeps it on the watch list.
Market size 3Growth 57Conversion 96Competition 19Returns 96Price range 90Avg price 95Brand share 24Review moat 84Quality gap 48
**Conversion**
**Incredible****13.5%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.9%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$23.06**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$12.73–$47.35**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Great****325.5**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Good****+31.2%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Bad****90%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****78%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****$12K**
$12K/yr · 4K searches
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United States niche tracking, polaris 3900 bag is a $12K/yr Amazon United States market (4K searches/yr). The top 5 brands hold 90% of demand. Demand peaks in Apr–May–Jun–Aug. Verdict: Worth a look — 52/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **polaris 3900 bag market data**
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$17K–$23K**
- units × avg price
- **Conversion rate**
- **13.5%**
- **Avg BSR**
- **#527**
- **Page quality**
- **0%**
- **Prime**
- **90%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **67 months**
- **Avg seller age**
- **220 days**
## **Competition & brand share**
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**7 **▲rising
**Sellers**
**30**
**Top-5 brand share**
**90%**
Top 20: 100%
**Top-5 click share**
**78%**
Top 20: 100%
**Open market**
**4%**
- UCEDER25% - ATIE23% - Polaris18% - MUSCCCM18% - PGFUN6% - Podoy5% - Open — no brand owns it (1 brand, 4%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +31.2% search growth over the last 90 days.
150100Spike '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Apr, May, Jun, Aug · busiest ÷ quietest = 3.5×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/polaris-3900-bag/trend)
## **Top polaris 3900 bag 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%10%$1K20%$2K30%$3K40%$5K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**UCEDER 3900 Double Pool Cleaner Replacement Bag with Zipper Enclosure**UCEDER**$19.70**4.5★83 rev](https://www.amazon.com/dp/B0FCRTCFX2) [2**ATIE 3900 Sport P39 Pool Cleaner Double Chamber All Purpose SuperBag 39-310 with Zipper Enlosure Replacement Compatible with 3900 Sport and P39 Pool Cleaners (2 Pack)**ATIE**$20.30**4.3★483 rev](https://www.amazon.com/dp/B09SX6GBWV) [3**MUSCCCM 3900 Sport Double Chamber Design 39-310 Pool Cleaner Bags**MUSCCCM**$18.88**4.2★86 rev](https://www.amazon.com/dp/B0F1YSQ9XF) [4**Polaris Genuine Parts Bundle - Superbag 39-310 & (2) Sweep Hose Scrubbers 9-100-3105 for Polaris 3900 Sport P39**Polaris**$47.35**5.0★6 rev](https://www.amazon.com/dp/B0DKTTXY7V) [5**PGFUN 2 Pack 3900 Sport and P39 Pool Cleaner Bags Double Chamber Pull-Tape Design**PGFUN**$19.74**4.2★85 rev](https://www.amazon.com/dp/B0F1XZPZWT)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Chuanke 3900 Pool Cleaner Bag for 3900 Sport 39-310 Double Space All Purpose Filter Bag with Zipper SuperBag Accommodate 5 Liters Capacity Compatible with 3900 P39 480 280 Pool Cleaners (2 Pack)**Chuanke**$19.47**8 rev10mo ago](https://www.amazon.com/dp/B0FRD7F8XL) [**UCEDER 3900 Double Pool Cleaner Replacement Bag with Zipper Enclosure**UCEDER**$19.70**83 rev1y ago](https://www.amazon.com/dp/B0FCRTCFX2) [**UCEDER 3900 Double Pool Cleaner Replacement Bag with Zipper Enclosure**UCEDER**$12.73**83 rev1y ago](https://www.amazon.com/dp/B0FCRYGMQZ) [**MUSCCCM 3900 Sport Double Chamber Design 39-310 Pool Cleaner Bags**MUSCCCM**$18.88**86 rev1y ago](https://www.amazon.com/dp/B0F1YSQ9XF) [**PGFUN 2 Pack 3900 Sport and P39 Pool Cleaner Bags Double Chamber Pull-Tape Design**PGFUN**$19.74**85 rev1y ago](https://www.amazon.com/dp/B0F1XZPZWT)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Chuanke 3900 Pool Cleaner Bag for 3900 Sport 39-310 Double Space All Purpose Filter Bag with Zipper SuperBag Accommodate 5 Liters Capacity Compatible with 3900 P39 480 280 Pool Cleaners (2 Pack)**Chuanke**$19.47**4.6★**▲ 134%**](https://www.amazon.com/dp/B0FRD7F8XL) [**3900 Sport P39 Pool Cleaner Bag Compatible with Polaris 3900 Pool Cleaner 39-310 Zipper Bag Accommodate 5 Liters Capacity with 9-100-3105 Sweep Hose Scrubber by Podoy**Podoy**$14.31**4.3★**▲ 53%**](https://www.amazon.com/dp/B0851VWZ83) [**Polaris Genuine Parts Bundle - Superbag 39-310 & (2) Sweep Hose Scrubbers 9-100-3105 for Polaris 3900 Sport P39**Polaris**$47.35**5.0★**▲ 45%**](https://www.amazon.com/dp/B0DKTTXY7V) [**UCEDER 3900 Double Pool Cleaner Replacement Bag with Zipper Enclosure**UCEDER**$19.70**4.5★**▲ 22%**](https://www.amazon.com/dp/B0FCRTCFX2) [**ATIE 3900 Sport P39 Pool Cleaner Double Chamber All Purpose SuperBag 39-310 with Zipper Enlosure Replacement Compatible with 3900 Sport and P39 Pool Cleaners (2 Pack)**ATIE**$20.30**4.3★**▲ 18%**](https://www.amazon.com/dp/B09SX6GBWV)
**~~View all trending →~~**
## **What buyers say about polaris 3900 bag**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**21%
*“Very good value for money”*
**Ease Of Cleaning**17%
*“help maintain your pool cleaner's efficiency”*
**Size-Overall**14%
*“Fits well”*
**Quality-Overall**11%
*“Good quality”*
**Durability**6%
*“They are super durable”*
**Assembly/Installation**5%
*“Easy to install”*
**Strength**4%
*“Well made and sturdy”*
**Ease Of Use**3%
*“Easy to use”*
**Storage Capacity**3%
*“Large capacity”*
**Material Quality**3%
*“The material feels durable”*
### **What buyers complain about **
**Ease Of Cleaning**19%
*“hard to remove from cleaner and zipper failure”*
**Size-Overall**14%
*“The adapter of these bags is very loose”*
**Quality-Overall**10%
*“Two strikes, not worth going the cheap route this time”*
**Durability**10%
*“Didnt hold up over time”*
**Unsustainable Design**8%
*“More of a design issue I have to deal with”*
**Ease Of Use**7%
*“The zippers would be very difficult to operate”*
**Value For Money**6%
*“know that the brands original bags are usually quite expensive”*
**Functionality-Overall**4%
*“Not effective”*
**Hard Feel**2%
*“These are still hard”*
### **Top return reasons **
**Size-Overall**54%
**Add-Ons/Attachments**7%
**Defective Material/Parts**6%
**Advertised Vs Actual Product**5%
**Functionality-Overall**5%
**Mechanism Issues**3%
**Connectivity-Overall**3%
**Stitch/Finish/Polish**3%
**Material Quality**3%
**Design-Overall**2%
## **Common questions**
- **Is polaris 3900 bag profitable to sell on Amazon United States?**
- The niche generates $12K/yr across 10 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +31.2%. Flapen's verdict: Worth a look (52/100).
- **How competitive is the polaris 3900 bag niche?**
- 7 brands and 30 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 90% of demand.
- **What do buyers complain about in polaris 3900 bag?**
- Top complaints mined from reviews: Ease Of Cleaning, Size-Overall, Quality-Overall. The return rate is 0.9%.
- **When does demand for polaris 3900 bag peak?**
- Demand peaks in Apr–May–Jun–Aug; the busiest month runs 3.5× the quietest.
- **What does it cost to enter the polaris 3900 bag niche?**
- Listings span $12.73–$47.35; the average listing price is $23.06 (sweet spot $15–$100). The average incumbent carries 326 reviews — the moat a new listing must climb.
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