  We study the near-infrared properties of 690 Mira candidates in the central
region of the Large Magellanic Cloud, based on time-series observations at
JHKs. We use densely-sampled I-band observations from the OGLE project to
generate template light curves in the near infrared and derive robust mean
magnitudes at those wavelengths. We obtain near-infrared Period-Luminosity
relations for Oxygen-rich Miras with a scatter as low as 0.12 mag at Ks. We
study the Period-Luminosity-Color relations and the color excesses of
Carbon-rich Miras, which show evidence for a substantially different reddening
law.
