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

C Line Retainer | Desertcart UK

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Description

🕶️ Never lose your shades, always own the moment.

DURABLE STYLISH - Premium coated wire with signature logo bead for lasting performance and brand pride
CUSTOM FIT COMFORT - Adjustable 20-inch length for personalized wear and effortless convenience
SLEEK MINIMALIST - Ultrathin wire ensures a barely-there feel with maximum style
SECURE ALL DAY HOLD - Keeps your sunglasses perfectly in place, on and off the water
UNIVERSAL COMPATIBILITY - Designed to fit all Costa sunglasses seamlessly—no compromises

The Costa Del Mar C-Line Retainer is a 20-inch ultrathin, lightweight coated wire strap designed to securely hold all Costa sunglasses. Featuring an adjustable length and a signature logo bead, it combines durability with sleek style, ensuring your eyewear stays put whether you're on the water or on the go.

Specifications

ASIN	B0058V584O
Age Range Description	adults
Best Sellers Rank	513,731 in Fashion ( See Top 100 in Fashion ) 325 in Men's Glasses Chains & Lanyards
Brand Name	Costa Del Mar
Care instructions	Hand wash only. Avoid contact with harsh chemicals. Air dry.
Colour	Black
Compatible Devices	All Costa Sunglasses
Customer Reviews	4.6 out of 5 stars 6,119 Reviews
Fastener Type	Snap
Global Trade Identification Number	00097963476874
Included Components	cloth
Item Type Name	Leash.
Item Weight	0.02 Pounds
Manufacturer	Pro-Motion Distributing - Direct
Manufacturer Part Number	CE-11
Material Type	Silicone
Material composition	100% Silicone
Model Number	A6S0003KT
Pattern	Solid
Size	20 Inch
Style Name	Costa C-line Retainer
UPC	097963663892 799475042683 097963476874
Unit Count	1.0 count

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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