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Swiss Shield Ultima
Product #: SLT-1343

Swiss Shields Highest Attenuation Non Conductive Cotton Shielding Fabric - Radio Frequency / Microwave effectiveness of 99.992% or 41 dB at (1000 MHz  / 1 GHz) and over 99.2% or 21 dB effective up to (10,000 MHz / 10 GHz) (Width= 250 cm or 98.4 inches)
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Ultima is our most dense decorative natural cotton fabric with the best radio frequency / microwave radiation shielding characteristics 

  • Top of the line sheer natural cotton fabric.  More dense than Naturell

  • Ideal for curtains to shield windows

  • Designed and manufactured in Switzerland

  • OEKO-TEX Certified as a skin friendly textile and free from harmful substances

  • Used for shielding large surfaces (walls and windows) from high frequency electromagnetic waves (microwaves)

  • Unmatched shielding characteristics

  • Shielding Effectiveness 99.992% or 41 dB at 1000 MHz and 99.2% effective up to 10 GHz

  • Effective shielding for cell towers, cordless phones, security systems, wireless computer gear and more

  • Sheer fabric, easy to work with

  • Easy care – Washable, with no loss in protection

Detect, Protect and Verify: Three Steps to Achieving Peace of Mind

Supplied With:

Desired Quantity of Fabric

Technical Data


Width / Length:

250 cm (98.4 inches) +/- 1 inch / by the meter or foot


Sheer, Slightly Off White


Washable, colourfast, antistatic


Hand wash in cold water, hang to dry

Raw Materials:

82% cotton, 18% copper/silver


MIL-STD 285, NSA 65-6, Öko-Tex Standard 100+1000

Shielding Characteristics:

99.992% or 41 dB at 1000 MHz

Washing and Drying Care

See downloads tab: Fabric and Installation Guide

Installation and Care Instructions for Swiss Shield Fabrics
OEKO-TEX Human Ecological Safety Certificate
Shielding results for Swiss Shield Ultima at various frequencies
Swiss Shield Ultima RF Shielding Performance
Swiss Shield Wear Spec. Sheet