KMS HairStay Anti-Humidity Seal 117g Double KMS HairStay Anti-Humidity Seal 117g Double Buy Online | Fast Shipping | Free Delivery over £25 | Free Returns | Not on Amazon KMS HairStay Anti-Humidity Seal 117g Double Stock up on this hero product with this handy double pack. The HairStay range will provide humidity protection with up to 3 days hold, for a natural, lasting style. The Anti-Humidity Seal acts like an umbrella for your hair, for a shiny, weightless finish.. Formulated with the new TRIfinity Technology to help your hairstyle stay just the way you want it! | Buy Online | Fast Shipping | Free Delivery over £25 | Free Returns | Not on Amazon