Any textile needs a standard finish in order to bring you that perfect, soft feel. Shams that are not treated are unsanitary and rough. We use the lightest amount of finish on our covers to provide you the perfect, clean duvet cover. All duvet covers, sheets, or textile processing have chemicals on them. All chemicals & dyes used for our sheets and duvet covers meet the OEKO-TEX standards for being safe and earth friendly. These chemicals are used to sanitize our textiles and make them soft to the touch, as this is an industry standard. Rest assured, your duvet cover is perfect for those with sensitive skin or allergies.