Covered optical fibers are provided comprising at least on optical fiber;
and a buffer tube covering surrounding the optical fiber. The buffer tube covering
is comprised of a blend of at least 40% by weight of a copolyether ester elastomer,
at least 10% by weight of a rubbery modifier, and at least 10% by weight of an
amorphous thermoplastic polymer, and has a melting point of at least 165
C. and a Trouser Tear Strength of less than 65 N/mm.
