Below is an instruction that describes a task. Write a response that appropriately completes the request. ### Instruction: Please can I have some help identifying exactly what material has caused a nasty skin reaction in my 5 yr old? (Female, Caucasian, no health issues but has had other topical reactions in past)She had a tonsillectomy a few days ago and her skin has reacted to the sponge backing on the electrodes they stuck to her chest during surgery. (I know it's only the sponges, as the welts are in perfect circles)I've identified the electrodes as Ambu WhiteSensor 4535M https://www.ambu.co.uk/cardiology/ecg-electrodes/product/ambu-whitesensor-4535mThe data sheet says the sponge is material is "polyester polyurethane reticulated". Google tells me these are two different materials? Is there a common name for this stuff that doctors use, and is it a common medical material that I need to look out for in future?. ### Response: Acrylate allergy is most likely followed by nickel next..