Silver Fiber Lined Baseball Cap — EMF Shielding

A regular black cotton baseball cap with a conductive silver fiber lining. The lining reduces radio-frequency (RF) signals passing through the fabric, so less RF reaches the area the cap covers: the top and back of the head. It's for people who want head shielding that looks like an everyday cap.

Details

• Outer: soft cotton, black
• Lining: silver fiber-nylon shielding fabric
• Fit: adjustable, 61 to 65 cm (24 to 25.6 in) around
• Crown depth: 12 cm (4.72 in) · Visor: 7.5 cm (2.95 in)
• Care: hand wash gently and air dry. Never bleach, and skip fabric softener; both damage the silver fiber
• Bulk orders: wholesale pricing and custom branding on request

How to Check It Works

Take a reading with an RF meter where you usually sit, then hold the meter up inside the crown of the cap and read again. A lower reading inside shows the lining attenuating the signal. Results depend on the source, the distance and the fit, so we don't promise a number. Our guide to measuring EMF at home walks through it.

Honest Notes

• It can't shield your face, ears, neck or anything else the cap doesn't cover.
• It's made for radio-frequency sources such as Wi-Fi, Bluetooth and cellular, not for low-frequency magnetic fields from household wiring and appliances.
• It's not a medical device, and we don't promise any outcome.

Free standard shipping within the US.