These 100% pure cotton wipes are specially formulated to naturally clean and protect your mask without the use of harmful chemicals. Contour CPAP Mask Wipes effectively remove dirt, grease, oils and other organic residue from your mask and other CPAP equipment. No more washing and soaking your equipment! These 100% Pure Cotton wipes are specifically formulated to naturally clean and protect your mask by effectively removing dirt, grease, oils and other organic residue.