Y-band (top left), J-band (top right), H-band (bottom left), and K-band (bottom right) spectra of cool dwarfs with effective temperatures between 4800 and 4480 K. The hottest stars are shown at the top of the plots. Stars with truncated Y-band coverage were observed at the Palomar 200″ Hale Telescope using TripleSpec; the other stars were observed at the IRTF using SpeX.