Z-Flex is the Most Durable & Protective Aluminized Fabric Available

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An insulated suit for conductive, convective & radiant heat

The X40 Insulated Proximity Suit is a moderately insulated aluminized suit designed for industrial applications. The X40 suit features a Z-Flex® Aluminized Fiberglass Fabric radiant shell, a Z-Flex® Aluminum Foil Fabric layer for added radiant protection, fiberglass insulation to protect from exposure to conductive and convective heat, and a Quilted Nomex® liner for comfort and additional protection from conductive and convective heat. All X Series suits are designed to be worn over standard industrial work wear. It is important for users to wear long-sleeve shirts and pants made with non-flammable fibers.

The X40 can be used in a wide range of industries and applications including in the casting, foundry, and petrochemical industries for kiln and oven operations and hot maintenance and repair operations.

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X40 Insulated Proximity Suit

  • Item: 2100341
  • Weight: 30.00 lbs14 kgs
  • Size: Medium - 2XL
  • Style: X40 Ultra
  • Ambient Temp: 800 °F430 °C
  • Radiant Temp: 3000 °F1650 °C

Suit Construction

  • Z-Flex A-601 aluminized glass outer shell
  • Z-Flex AF F-628 Foil
  • Fiberglass mat insulation
  • Quilted Nomex® liner


Testing & Certification

The suit lay-up meets the ISO 11612 Standard

The Z-Flex® shell meets or exceeds the following:
  • Radiant Heat: ISO 6942 / EN 366 / ASTM F1939
  • Convective Heat: ISO 9151 / EN 367
  • Limited Flame Spread: ISO 15025 / EN 532
  • Molten Metal: ISO 9185 / EN 348 / ASTM F955
  • Abrasion Tear Resistance: ISO 13937 / EN 388



  • The X40 Insulated Proximity Suit is available in sizes Medium, Large, and X-Large.
  • 2XL and custom sizes are available for an additional charge.
  • See our Sizing Chart for more information.



  • The total weight of the jacket and pants is approximately 16 lbs (7.3 kg).
  • The total weight of the entire ensemble (jacket, pants, hood, gloves, and boots) is approximately 25 lbs (11.3 kg).

Suit Features

  • Zipper and velcro double storm fly closure
  • Cinch at waist for athletic fit
  • Integrated breathing pouch to accommodate SCBA
  • SCBA Pouch measures 29" (74 cm) in length and has a 9" (23 cm) inner diameter
  • Raglan sleeves for freedom of movement
  • Sewn-in suspenders for adjusting pant drop
  • Adjustable leg opening for easy donning
  • Dome style hood
  • Hard cap with ratchet adjustment*
  • Full shoulder length drape with elasticized underarm straps
  • Rounded bib for improved range of motion
  • Polycarbonate lens with a gold film
  • Aluminum retainer holds the lens securely in place
  • Designed for use with low profile SCBA only
  • Gauntlet style aluminized gloves
  • 3-Finger design for superior dexterity and insulation
  • ZetexPlus® palm and thumb for protection from direct contact with hot objects
  • Elastic cuff for a tight seal 
  • New easy-on design
  • Leather sole for grip
  • Adjustment straps for fit
  • For wear over work boots
  • One size fits most
Also Included
  • Ballistic nylon duffle bag for storage
  • Nomex® balaclava
* Hard cap meets ANSI-Z89.1-2009 impact resistance tests