The Air Sponge was developed based on the following desires: "I want to do my makeup quickly and easily." "I want a sponge that applies primer and foundation evenly." "I absolutely don't want my makeup to smudge." For more details, please see: https://www.excess-beauty.shop/view/item/000000000164?category_page_id=tools I am selling this because I no longer use the sponge.