Gas Mask OG offers long-lasting psychoactive effects and intense cerebral sensations. It is great for alleviating stress and relaxing. Gas Mask OG is a super fragrant strain, with an aroma so pungent, you might need a gas mask! This strain With a series of water filters, Nasha, uses pure mountain water to produce their hash that has a sand-like consistency, and is made up of thousands of tiny intact trichomes. Gas Mask is an indica dominant strain.