Revitex VSC75 RW
Sleeving made of a special silicone
rubber coated fiberglass braid.
[...]
Expandable braided fiberglass
sleeving impregnated with silicone
varnish. Its special form for braiding,
allows increasing the inside diamter
of the sleeving considerably,
the sleeving of the same time
contracting in length.
Fiberglass and silicone.