- Head shielding for radio-frequency electromagnetic fields.
- Made from black stretch cotton, with a silver metal thread incorporated for shielding.
- Comfortable to wear.
- Light enough to wear beneath another hat.
- 90% Cotton.
- Machine wash at 30C.
- Weighs 16g.
- This item is not a PPE Industrial protective clothing. It is for use domestic and other non-hazardous areas.