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

Unisex Adult C Line Retainer | Desertcart Belgium

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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€ 29.91

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🕶️ Never lose your cool—keep your shades locked in style!

UNIVERSAL FIT - Works seamlessly with every Costa sunglasses model
FEATHERLIGHT COMFORT - Ultra-lightweight wire ensures you barely notice it all day
SLEEK 20 INCH DESIGN - Perfect length to keep your shades secure without bulk
ICONIC COSTA BRANDING - Subtle logo bead for a touch of premium style and authenticity
DURABLE SILICONE SNAP FASTENER - Secure hold that’s easy to attach and remove

The Costa Del Mar C-Line Retainer is a 20-inch ultrathin, lightweight sunglass leash designed to keep your Costa sunglasses secure on and off the water. Made with durable silicone and featuring a sleek logo bead, it offers universal compatibility with all Costa sunglasses, combining functionality with subtle, premium branding.

Specifications

ASIN	B0058V584O
Age Range Description	Adult
Best Sellers Rank	#17,531 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #3 in Men's Eyeglass Chains
Brand Name	Costa Del Mar
Care instructions	Hand wash only. Avoid contact with harsh chemicals. Store in a cool, dry place.
Color	Black
Customer Reviews	4.6 out of 5 stars 8,480 Reviews
Fastener Type	Snap
Garment Size Country	United States
Global Trade Identification Number	00097963476874
Import Designation	Made in the USA
Included Components	cloth
Item Type Name	Leash
Item Weight	9.07 g
Manufacturer	Pro-Motion Distributing - Direct
Manufacturer Part Number	CE-11
Material Type	Silicone
Number of Items	1
Origin	Made in the USA
Pattern	Solid
Size	20 Inch
Style Name	Costa C-line Retainer
Style Number	A6S0003KT
UPC	097963663892 799475042683 097963476874
Unit Count	1 Count

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