Prefer a shielding garment that no one will notice? This typical looking hoodie sweatshirt does the trick for the upper body and head! Made from very comfortable 17% Nylon and 83% Modal and tested to 90% or better RF attenuation over the frequency range from 1 GHz to 8 GHz. Silverell Hoodie EMF shielding Performance Graph In addition, the high conductivity of silver causes Silverell to have antistatic behavior, plays an important role in minimizing body odor, and has a strong inhibitory effect on the growth of bacteria (actually acts as an antiseptic!). Loose fitting pull over style and without a drawstring for the hood. No front pocket, cuffed sleeves. Washing Instructions for Silver Fabrics and Garments: 1.CHECK YOUR WATER QUALITY. Poor water quality will damage silver. In particular, high concentrations of sulfur, fluoride, chlorine, or low pH will destroy conductivity and shielding performance. To test your water, soak a small swatch in tap water for 1 hour. Watch for color change in the water or the material, especially blackening. If there is any color change to either the water or the material, use distilled or reverse osmosis water instead. 2.Water temperature must be below 40°C/104°F. 3.Detergent - Use neutral detergent such as TexCare. NO BLEACH or detergent with bleach ingredients. 4.Do not wring. 5.Hang to dry promptly after washing, do not leave in blazing sun 6.Keep in mind that washing will eventually degrade silver, and discoloration over time is normal.