  We present twin Higgs models based on the extension of the Standard Model to
left-right symmetry that protect the weak scale against radiative corrections
up to scales of order 5 TeV. In the ultra-violet the Higgs sector of these
theories respects an approximate global symmetry, in addition to the discrete
parity symmetry characteristic of left-right symmetric models. The Standard
Model Higgs field emerges as the pseudo-Goldstone boson associated with the
breaking of the global symmetry. The parity symmetry tightly constrains the
form of radiative corrections to the Higgs potential, allowing natural
electroweak breaking. The minimal model predicts a rich spectrum of exotic
particles that will be accessible to upcoming experiments, and which are
necessary for the cancellation of one-loop quadratic divergences. These include
right-handed gauge bosons with masses not to exceed a few TeV and a pair of
vector-like quarks with masses of order several hundred GeV.
