Are these straps adjustable? I know that it says that thay are in the info, but some reviews say that they aren't.

No they're not adjustable. The ends attach to the sun glasses and the cord hangs behind your neck as it. Nothing to adjust.

What is the difference between C-line and C-mono?

It's the material the strap is made of, the mono is made of monofilament the c-line is a rubber coated material

Hi Marie,The retainer is about 18 inches long. It is much shorter than most retainers, it is made to fit closely as some people don't like their sunglasses to hang too low. Please keep in mind that the strap has a breakaway feature to prevent strangulation, much like a cat collar therefore has no warranty privileges. It is an awesome super light weight strap and honestly most people love them, just beware not to yank on the glasses or you will snap off the end.I hope this was helpfulEJ's SunglassesAuthorized Costa del Mar dealer

This add is deceiving, picture in add indicates 16" length, after placing in cart, item then lists as 13" ultra thin retainer? Need 16" or longer ???

Hello, The strap from end to end is 20" EJ's

Costa Del Mar C Line Retainer Black

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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HK$270

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In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Specifications

ASIN	B0058V584O
Age Range Description	All Ages
Brand Name	Costa Del Mar
Colour	Black
Customer Reviews	4.6 out of 5 stars 6,108 Reviews
Fastener Type	clasp
Global Trade Identification Number	00097963476874
Item Weight	8 g
Manufacturer Part Number	CE-11
Pattern	Solid
Style Name	Silver
Style Number	A6S0003KT
UPC	097963663892 799475042683 097963476874

Reviews

N**.

Muy buen producto este retenedor!

Muy buen producto, calidad en los materiales!

9.03.2026

H**E

Looks good & simple.

Easily clings, extends & shortens easily too.

20.10.2025

N**S

El cordón Costa para lentes tiene muy buena calidad y se siente resistente desde el primer uso.

Jenial

20.05.2026

R**S

Five Stars

great product

21.07.2017

R**L

Excellent product

Secure fit on the frames. Not tight against the scalp when wearing them.

14.03.2026

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2 months ago

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The delivery time was excellent, and the packaging was secure.

2 months ago

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HK$270

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hong Kong.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

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Costa Del Mar C-Line Retainer - Black

Description

Specifications

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Common Questions