This papercraft is an Anti Gas Mask, based on the first-person shooter survival horror video game S.T.A.L.K.E.R.: Clear Sky, which is the prequel to S.T.A.L.K.E.R.: Shadow of Chernobyl, the paper model is created by Sinner.
You can download this paper model template here: S.T.A.L.K.E.R.: Clear Sky - Anti Gas Mask Papercraft Free Download [Box] [Gavitex]