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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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Swiss Shield Fabrics and Bed Canopies

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

Comparison of Swiss Shield Fabric Details
Care Instructions for Swiss Shield Fabrics
OEKO-TEX Human Ecological Safety Certificate
Shielding results for Swiss Shield Ultima at various frequencies
Swiss Shield Fabrics Shielding Comparison Line Graph
Swiss Shield Ultima RF Shielding Performance
Swiss Shield Ultima Spec. Sheet