Swiss Shield Naturell Fabric - Linear Meter X 250cm
Product Overview
Swiss Shield Naturell is a premium, decorative cotton fabric woven with a fine silvered-copper thread to shield interior spaces from high-frequency (HF) electromagnetic radiation — mobile and cordless phones, Wi-Fi, smart meters, cell towers and similar wireless sources. It is the most popular fabric in the Swiss Shield range and a long-standing favourite for window and wall curtains, bed canopies and room dividers.
The fabric reaches a shielding attenuation of around 37 dB at 900 MHz, easing across the higher bands (full per-frequency figures below). Its semi-transparent, slightly off-white weave lets light through while reducing incoming radiation, and the insulated metallic thread means it can be washed without losing shielding performance.
Naturell is non-conductive on its surface, with no exposed metal that can rub off or become airborne — making it well suited to electromagnetically hypersensitive (EHS) and chemically sensitive (MCS) users. Please note this fabric may carry a 7–10 day lead time. Sold by the linear metre (250 cm / 98.4 in wide).
Key Features
- Shielding attenuation of approximately 37 dB at 900 MHz, with verified performance measured up to 9.5 GHz
- Semi-transparent natural cotton weave — decorative and light-passing, ideal for curtains and canopies
- Non-conductive surface with no exposed metal; nothing can rub off or become airborne
- Insulated silvered-copper thread allows machine washing with no loss of shielding
- OEKO-TEX Standard 100, Class 1 certified — skin-friendly and free from harmful substances
- Designed and manufactured in Switzerland with a patented high-tech yarn
- Well suited to EHS and MCS users
- 250 cm wide, so a single drop covers most windows and walls without seams
Technical Specifications
Dimensions
Width: 250 cm (98.4 in), ±2 cm
Sold by: the linear metre
Materials
Composition: 82% cotton, 18% copper/silver
Construction: cotton fibre spun with a 0.02 mm silvered-copper thread
Colour: natural ecru / slightly off-white, semi-transparent
Weight: 69 g/m²
Dimensional stability: ±3%
Shielding Performance
High-frequency (HF) shielding attenuation, measured across 900 MHz to 9.5 GHz:
- 900 MHz (GSM): 37 dB
- 1.8 GHz (GSM): 35 dB
- 2.45 GHz (Bluetooth / Wi-Fi): 34 dB
- 5.8 GHz (Wi-Fi): 27 dB
- 9.5 GHz (X-band radar): 20 dB
Surface: non-conductive (PES-coated); reflects HF radiation and does not require grounding
Certification
OEKO-TEX Standard 100, Class 1 — tested for harmful substances; verified by the Swiss Textile Research institute (STR).
Care Instructions
- Machine wash on a gentle cycle in cold water
- Iron without steam on the lowest temperature setting
- Do not bleach
- No chemical dry cleaning
- Hang to dry — do not tumble dry
Applications
- Window and wall curtains to shield rooms from external HF radiation
- Bed canopies for a lower-radiation sleeping environment
- Room dividers and wall hangings
- Floor sheets and large-surface shielding
- Suitable for homes, offices and the chemically or electromagnetically sensitive
Before You Buy
- We recommend measuring RF exposure before and after installation. If unsure, consult a qualified EMR technician or use suitable measuring equipment.
- Where possible, also reduce low-frequency AC electric fields (ELF) in the installation area — Naturell shields HF radiation but is not grounded.
Safety information: This fabric contains fine metallic threads and is flammable. Keep it away from exposed electrical outlets, wiring and open flames to ensure safe use.
