Waterproofing spray can contain different kinds of chemicals that are flammable and can also make you dizzy and drowsy. That is why Hanna’s sister is spraying her shoes outside. Before she started spraying she checked the wind direction: it is a bad idea to spray against the wind because you risk inhaling the fumes.

Hanna’s big sister has a lot of shoes in her closet. She loves her shoes and takes good care of them. Today she is on the terrace proof-spraying all of her suede shoes in many colours.

Why is Hanna’s big sister proof spraying her shoes outside the house?