  The Son Of X-Shooter (SOXS) is a single object spectrograph, built by an
international consortium for the 3.58-m ESO New Technology Telescope at the La
Silla Observatory [1]. It offers a simultaneous spectral coverage over 350-2000
nm, with two separate spectrographs. In this paper we present the status of the
Near InfraRed (NIR) cryogenic echelle cross-dispersed spectrograph [1], in the
range 0.80-2.00 {\mu}m with 15 orders, equipped with an 2k x 2k Hawaii H2RG IR
array from Teledyne, working at 40K, that is currently assembled and tested on
the SOXS instrument, in the premises of INAF in Padova. We describe the
different tests and results of the cryo, vacuum, opto-mechanics and detector
subsystems that finally will be part of the PAE by ESO.
