For less than $3 they do the job and are quite handy. I haven't had the issues that others have mentioned about the mismatch between the L and R labels and they fit really well, like the size I'm currently wearing on the headphones. I increased the size from the default. So if it doesn't fit you, it may fall out. I also found that the length of the strap is a bit shorter. The texture tends to stick to my throat, which isn't very comfortable. I haven't used it extensively, so I can't comment on durability. This isn't necessarily a fault of the product, but you can remove them from the buds when you're done.
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