---
title: "costa sunglass parts — Niche Verdict: Worth a look (52/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/clothing-shoes-jewelry/costa-sunglass-parts"
last_updated: "2026-07-13T23:27:49.526Z"
locale: en
meta:
  description: "costa sunglass parts shows demand growing +119.0% this quarter, but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list."
  "og:description": "costa sunglass parts shows demand growing +119.0% this quarter, but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list."
  "og:title": "costa sunglass parts — Niche Verdict: Worth a look (52/100) | Amazon United States - Flapen"
---

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# **costa sunglass parts**

**Worth a look**

Shows demand growing +119.0% this quarter, but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.

Market size 31Growth 95Conversion 78Competition 53Returns 81Price range 32Avg price 49Brand share 0Review moat 23Quality gap 42

**Growth**

**Incredible****+119.0%**

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

**Returns**

**Great****1.7%**

return rate — above 6% kills the launch gate

**Conversion**

**Great****7.8%**

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

**Competition**

**Good****53%**

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

**Avg price**

**Okay****$11.90**

avg listing price — sweet spot $15–$100

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Price range**

**Okay****$8.82–$17.91**

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

**Market size**

**Okay****$140K**

$140K/yr · 150K searches

**Review moat**

**Bad****8,152.09**

avg incumbent reviews — the moat a new listing must climb

**Brand share**

**Bad****100%**

top-5 brand share — brand-locked demand

## **Competition**

The top 5 products take 53% of clicks — established leaders, but buyers still shop beyond them.

**Brands**

**4 **—flat

**Sellers**

**8**

**Top-5 brand share**

**100%**

**Open market**

**0%**

- Costa Del Mar75% - Pilotfish23% - Maui Jim1% - Buyisgle1%

## **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%4%$6K8%$11K12%$17K16%$22K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

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

All 22 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Costa C-Line Retainer Black 20in](https://m.media-amazon.com/images/I/31y+K7LYYXL.jpg)**Costa C-Line Retainer Black 20in**Costa Del Mar**$10.05**4.6★8,316 rev](https://www.amazon.com/dp/B0058V584O) [2![Costa Del Mar Sunglasses and Glasses Strap Costa C-Line Adjustable Retainer Black 20in](https://m.media-amazon.com/images/I/21uuK+dvtzL.jpg)**Costa Del Mar Sunglasses and Glasses Strap Costa C-Line Adjustable Retainer Black 20in**Costa Del Mar**$14.88**4.7★2,587 rev](https://www.amazon.com/dp/B0882NJPCV) [3![Costa Del Mar Sunglasses and Glasses Strap Costa Bowline Silicone Retainer Black/Blue 19in](https://m.media-amazon.com/images/I/31l1N7dsDtL.jpg)**Costa Del Mar Sunglasses and Glasses Strap Costa Bowline Silicone Retainer Black/Blue 19in**Costa Del Mar**$12.08**4.6★3,411 rev](https://www.amazon.com/dp/B01MUKVW7O) [4![Costa Del Mar Sunglasses and Glasses Strap C-Line Retainer Royal Blue 20 Inches](https://m.media-amazon.com/images/I/21cWLKU9uZL.jpg)**Costa Del Mar Sunglasses and Glasses Strap C-Line Retainer Royal Blue 20 Inches**Costa Del Mar**$11.69**4.6★8,316 rev](https://www.amazon.com/dp/B0BKBZK4GL) [5![Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses Eyeglasses Glasses (14 Inch Tactical Black)](https://m.media-amazon.com/images/I/31Jp42w1BoL.jpg)**Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses Eyeglasses Glasses (14 Inch Tactical Black)**Pilotfish**$11.18**4.4★17,896 rev](https://www.amazon.com/dp/B072VXHZ1V)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Maui Jim Cablz Sunglass Retainer](https://m.media-amazon.com/images/I/21L4ErtuTcL.jpg)**Maui Jim Cablz Sunglass Retainer**Maui Jim**$12.49**335 rev1y ago](https://www.amazon.com/dp/B0DG35MJDB) [![Costa Del Mar C-Line Loop Retainer Silver/Black 20 In](https://m.media-amazon.com/images/I/21oscLgNE4L.jpg)**Costa Del Mar C-Line Loop Retainer Silver/Black 20 In**Costa Del Mar**$15.14**97 rev2y ago](https://www.amazon.com/dp/B0CX3PNZ66) [![Buyisgle Eye Glasses Holder Strap - Adjustable Sunglasses Straps Cords for Men Women - Eyeglass Holders Around Neck - Eyewear String Lanyard Retainer -2PCS14in Black](https://m.media-amazon.com/images/I/41PSbOud1tL.jpg)**Buyisgle Eye Glasses Holder Strap - Adjustable Sunglasses Straps Cords for Men Women - Eyeglass Holders Around Neck - Eyewear String Lanyard Retainer -2PCS14in Black**Buyisgle**$8.82**1,847 rev2y ago](https://www.amazon.com/dp/B0CL231D43) [![Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses Eyeglasses Glasses (14 Inch Blaze Orange)](https://m.media-amazon.com/images/I/414C3Q-Ag3L.jpg)**Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses Eyeglasses Glasses (14 Inch Blaze Orange)**Pilotfish**$11.15**17,896 rev3y ago](https://www.amazon.com/dp/B0BCTKWJ9L) [![Costa Del Mar Sunglasses and Glasses Strap C-Line Retainer Royal Blue 20 Inches](https://m.media-amazon.com/images/I/21cWLKU9uZL.jpg)**Costa Del Mar Sunglasses and Glasses Strap C-Line Retainer Royal Blue 20 Inches**Costa Del Mar**$11.69**8,316 rev3y ago](https://www.amazon.com/dp/B0BKBZK4GL)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses Eyeglasses Glasses (14 Inch The Original)](https://m.media-amazon.com/images/I/31RnUvMeehL.jpg)**Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses Eyeglasses Glasses (14 Inch The Original)**Pilotfish**$11.47**4.4★**▲ 44%**](https://www.amazon.com/dp/B01M25T8NZ) [![Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses Eyeglasses Glasses (16 Inch Gunmetal Gray)](https://m.media-amazon.com/images/I/314xFVPMVaL.jpg)**Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses Eyeglasses Glasses (16 Inch Gunmetal Gray)**Pilotfish**$11.19**4.4★**▲ 42%**](https://www.amazon.com/dp/B06Y2LT1MZ) [![Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses Eyeglasses Glasses (14 Inch Original 2-Pack)](https://m.media-amazon.com/images/I/416jRoSVqnL.jpg)**Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses Eyeglasses Glasses (14 Inch Original 2-Pack)**Pilotfish**$17.91**4.4★**▲ 36%**](https://www.amazon.com/dp/B0B2X5PHQB) [![Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses Eyeglasses Glasses (14 Inch Blaze Orange)](https://m.media-amazon.com/images/I/414C3Q-Ag3L.jpg)**Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses Eyeglasses Glasses (14 Inch Blaze Orange)**Pilotfish**$11.15**4.4★**▲ 36%**](https://www.amazon.com/dp/B0BCTKWJ9L) [![Costa Del Mar Sunglasses and Glasses Strap C-Line Retainer Mint 20 Inches](https://m.media-amazon.com/images/I/11CFrKVA-SL.jpg)**Costa Del Mar Sunglasses and Glasses Strap C-Line Retainer Mint 20 Inches**Costa Del Mar**$11.36**4.6★**▲ 30%**](https://www.amazon.com/dp/B0BKB1NMDB)

**~~View all trending →~~**

## **Demand**

Weekly Amazon search volume, last 41 weeks — +119.0% search growth over the last 90 days.

6K4KSpike '26Sep '25Nov '25Dec '25Feb '26Mar '26Apr '26Jun '26

## **Reviews**

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

### **What buyers love **

**Quality-Overall**23%

*“Good Quality, Secure strap for Glasses”*

**Size-Overall**16%

*“Great Fit”*

**Advertised Vs Actual Product**9%

*“As shown in picture”*

**Adjustability/Rotatability/Reclining**6%

*“its easy to adjust”*

**Value For Money**6%

*“Well Worth The Price”*

**Comfort-Overall**5%

*“Light and comfortable”*

**Ease Of Use**5%

*“Simple and effective”*

**Strength**5%

*“it feels sturdy”*

**Durability**4%

*“They don't break”*

**Grip**3%

*“doesn't fall off”*

### **What buyers complain about **

**Size-Overall**38%

*“to short”*

**Durability**17%

*“Break easily”*

**Quality-Overall**7%

*“Disappointing quality control”*

**Ease Of Use**6%

*“Uncomfortable”*

**Comfort-Overall**4%

*“not very comfortable”*

**Functionality-Overall**3%

*“Didn't work for me”*

**Value For Money**3%

*“It is only a 10.00 dollar item”*

**Stiffness**2%

*“the cable is a little too stiff”*

**Advertised Vs Actual Product**2%

*“Advertisement says two but only received one”*

**Grip**2%

*“Kept slipping off”*

### **Top return reasons **

**Size-Overall**50%

**Length**12%

**Advertised Vs Actual Product**8%

**Adjustability/Rotatability/Reclining**3%

**Strap/String Quality**3%

**Defective Material/Parts**3%

**Color**2%

**Stiffness**2%

**Functionality-Overall**2%

**Material Quality**2%