1.The YIZI conductive fabric mats are thin and flexibleoffers for daily protection . they are ideally suited for use as an undersheet, giving optimal protection to body.We have three sizes to choose from:19.7*19.7IN/39.4 X 42.5 IN/42.5 X 42.5 IN 2.The YIZI fabric is manufactured to the highest standard. Copper and nickel filaments, which are extremely conductive and therefore suitable for blocking out electromagnetic rays, are carefully woven into the material. 3. -You can use the mats when you are working on a laptop or tablet - Men should use a YIZI mat to reduce exposure to radiation to the prostate when a laptop is in direct contact with the body. 4.- By inserting it into your wallet, you can effectively prevent the theft of credit card data. This way your credit cards cannot be read. - It is also suitable for use as an insert inside a handbag. The original YIZI fabric has the advantage over other protective materials. - Ideal size for using as an undersheet to protect EMF away from the entire house. RFID prevents credit card data from being stolen when using PayWave and PayPass - it can also be cut to the required size. It can also be installed behind a plasterboard or under a floor type 5. Notice! Nickel may produce skin allergies, this material is not intended for direct contact with skin for long time.It is hand-washed below 30 degrees and is easy to clean. Naturally dry.