Swiss Shield Naturell Fabric - Sample Size 15 cm x 12 cm

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.

This listing is for a sample swatch (approximately 15 cm x 12 cm) so you can check the fabric's shielding, colour, weave and feel before ordering by the metre. The full fabric is non-conductive on its surface, with no exposed metal — well suited to electromagnetically hypersensitive (EHS) and chemically sensitive (MCS) users. Naturell is sold by the linear metre (250 cm / 98.4 in wide) on our main listing.

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
• Full fabric is 250 cm wide for seamless coverage of windows and walls

Technical Specifications

Dimensions

Sample size: approximately 15 cm x 12 cm (swatch)

Full fabric 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

• Test shielding, colour and feel before buying a full roll
• Window and wall curtains to shield rooms from external HF radiation
• Bed canopies for a lower-radiation sleeping environment
• Room dividers and wall hangings
• Suitable for homes, offices and the chemically or electromagnetically sensitive

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.