FlexiBloc Stretch Silver Fiber Fabric 66″ Wide

FlexiBloc: Stretch Silver Fiber Fabric for Making Garments

FlexiBloc is a soft, stretchy knitted fabric made to be sewn into your own EMF shielding garments. It is composed of 44% silver fiber, 35% cotton, 18% nylon and 3% spandex, and its comfort is comparable to high-quality cotton fabrics. If you would rather buy ready-made garments, browse our EMF clothing, or see our full range of EMF shielding fabrics.

Two-Way Stretch for Hoodies, Leggings and Shorts

FlexiBloc lends itself well to clothing because of its two-way stretch. That makes it a good choice for hoodies, leggings, shorts and other fitted garments you wear at home or on the go.

Shielding Performance

FlexiBloc provides about 38 dB of shielding from 30 MHz to 300 MHz, around 36 dB at 915 MHz, about 34 dB at 1.8 GHz, 33 dB at 2.45 GHz (2.4 GHz WiFi) and 32 dB at 5 GHz (5 GHz WiFi), falling to about 27 dB at 10 GHz. Decibels are a logarithmic scale: every 10 dB is a tenfold reduction in signal power, so 30 dB means 99.9% of the signal power at that frequency is blocked. See the Specifications tab for the full table, or watch our FlexiBloc test video.

Washable, With Care

FlexiBloc is washable, and it has been tested to withstand 40 washes before shielding effectiveness is compromised. To keep it working at its best, follow these care instructions:

• Wash with distilled, mineral, well or cooled boiled water to avoid and remove mineral ions.
• Cool wash with as little agitation as possible.
• Use a clear, unscented, uncolored detergent with a neutral pH.
• Avoid oils, including essential oils, since they will damage the silver.
• No fabric softener.
• No bleaching.
• Do not tumble dry or place over heaters. Line dry only.
• Cool iron.

Sold by the Length

FlexiBloc is 66 inches (170 cm) wide and sold in 3.25 ft (1 m), 5 ft (1.5 m) and 10 ft (3 m) lengths. Your order is cut as one continuous length, so if you need a longer length, increase the quantity in your basket. For example, a quantity of 3 of the 10 ft length arrives as one continuous 30 ft (9 m) piece.