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

Tell Me More

Have Questions? Need a Quote? Contact Us!

Tell Me More

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.

Related Downloads

Product Image for Item #2100341

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
  • 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