100 $\micron$ maps from the Improved Reprocessing of the *IRAS* (Neugebauer et al. 1984) Survey (IRIS; Miville-Deschenes & Lagache 2005), a data set which corrects the original plates for calibration, zero level and striping problems. The IRIS 100 $\micron$ maps in the HerMES level 5 and level 6 fields are discussed in Viero et al. (2013) and the IRIS 100 $\micron$ maps in HeRS and HeLMS are discussed in Hajian et al. (in prep.). The 100 $\micron$ maps in all of our fields are shown in Appendix \[appendix1\]. Here we have assumed that the dominant signal in the 100 $\micron$ maps comes from Galactic cirrus emission, not the DSFGs comprising the CIB. In other words, these 100 $\micron$ maps are used as a Galactic cirrus tracer in our fields[^8]. Visual inspection of the maps in Appendix \[appendix1\] confirms that extended diffuse Galactic cirrus emission are the dominant structures (long filamentary chains) in the 100 $\micron$ maps, especially in the HeRS and HeLMS regions. We have also computed the mean value of the 100 $\micron$ maps in the HeLMS, HeRS, [*XMM*]{}-LSS, Boötes and Lockman-SWIRE field to be 3.03, 2.84, 2.30, 1.42 and 1.09 MJy sr$^{-1}$, respectively. If we adopt the DIRBE 