KMS HairStay Working Hairspray 239g KMS HairStay Working Hairspray 239g The HairStay range will provide humidity protection with up to 3 days hold, for a natural, lasting style. The Working Hairspray is the ultimate creative finisher, allowing you to play with your style and re-work the shape. Formulated with the new TRIfinity Technology to help your hairstyle stay just the way you want it!