Wella EIMI Stay Essential is a light-hold finishing hairspray meant for a workable, touchable set rather than a stiff, crunchy one. Wella rates it hold level 2 and describes it as protecting hair from the effects of humidity, UV, and heat, a claim supported by two ingredients in the formula: ethylhexyl methoxycinnamate, a UV filter, and PEG-12 dimethicone, a silicone that adds slip and shine so the spray doesn't leave hair feeling coated.
As an aerosol, it's propelled by hydrofluorocarbon 152A and dimethyl ether, with an octylacrylamide/acrylates copolymer providing the actual hold, aminomethyl propanol balancing the formula's pH, and panthenol added for conditioning. It's meant to be misted over a finished style or worked in while shaping hair, not applied before blow-drying.