Expandable sleeving


My question is simple, what type of expandable sleeving is used for your higher grade cable manufacturers. Ie: Audioquest. It seems as though the sleeving I purchase from Amazon for DIY projects are far different in quality then what is used for in some the big cable names. Thoughts? Possible other sleeving manufacturers to consider?
golfnut49
I forgot Trojan.. they are pretty tough too.. :-) Pretty good armor..
Some have a version of expandable sleeve made for them, but most use a version of Techflex, they have many different options and I’m sure custom options as well.