The Anti-Radiation T-Shirts for women are made from 90% cotton, 8% polyamide, 2% silver and they are just as comfortable as a regular T-shirt but with the added value that they can protect your body against EMF radiation. The silver in the fabric is naturally antibacterial and can be washed up to 40 times without reducing shielding effectiveness. Washing instructions: Gentle wash (104º) with TexCare, do not use bleach or chemical detergents. Do not tumble dry. Iron with low heat.