Hey happy buyer!! These products are made by keeping in mind the sensitive skin and comfortablity of the children. This product do not have any harmful effects on child's feet, can be worn all day long. Made up of premium soft cotton fabric and foam, which are free from synthetic colours and chemicals. The sole is anti-slippery and potentially waterproof. These booties are free sized, comfortably fit for normal healthy babies from 0-12 months. This ensures that babies has an itch and rash free skin. Easy to wash, by hand or machine too.