The cs_ssp_suit_mod.zip file you have requested: Clear Sky / Mods / Singleplayer / SSP-99 and SSP-99M Suit Mod - 6.75mb is not available. Perhaps try browsing all files for the game S.T.A.L.K.E.R.: Clear Sky and upload any files you want to share or are missing. This is the only information we could locate:
This mod adds the SSP-99 Ecologist suit and the SSP-99M suit to clear sky. Both suits can be bought in yantar at the mobile lab.