Ossat Naturals Deeper Moisture Mask. Treat yourself to a deep conditioning treatment like no other. OSSAT Naturals Deep Moisture Mask is an ultra-rich, hydrating conditioner packed with vitamins and nutrients to moisturize, soften, and repair damaged hair. Infused with antioxidant-rich oils, keratin protein, and nourishing ingredients, this product hydrates while improving hair's elasticity, texture, shine, and manageability. Restore and strengthen hair follicles while reducing the appearance of breakage and shedding.