Hello Deema, Thank you for your review. Please be aware we use high quality hydrogel eyepatches that are used in most salons. Please remember that on a client consultation form there is a section where we ask about any allergies and skin disorders that might interfere with the treatment. This is a section where you can let us know if you have allergy to patches, sensitive skin or any other contra indications. Unfortunately we can’t know if you have sensitive skin or allergies if this was not indicated in the form therefore we can’t predict whether you will have a reaction or not. We hope that you like the result of the treatment and we look forward to your future visit where we will make sure we don’t use patches on your treatment! Kind Regards, London Lash Manchester