Breathable Sheet BREATHRON™

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Water and wind won't pass through, but air and moisture vapor do. This film truly breathes.

Water and wind won't pass through, but the necessary air is taken in, and moisture vapor is released. BREATHRON combines all of these functions into one material. Its secret comes from a complex mixture of microscopic pores in micron units. <Moisture Permeability and Water Resistance> <Air Permeability and Wind Resistance> This seemingly contradictory combination of features can be controlled upon the customer's request. These capabilities are also used in the adhesive heating pad industry, which requires highly-efficient ventilation and stability. BREATHRON breathable film meets a wide range of applications.


  • BREATHRON is a porous film, featuring hundreds of little holes that cannot be detected by the naked eye.
  • Air passes through, but water does not. Perspiration and moisture vapor pass through.
Air passes through, but water does not.
Perspiration and moisture vapor pass through.




Standard Size

Product width(mm) Product length(m)
315,420 500,1000


Product name BRN-A120E1 BRN-1860 BRN3000E1 BRN-9000EB
Thickness mm 0.25 0.35 0.25 0.27
Air resistance Sec/100cc 28000 4500 400 3900
Moisture-vapor permeability g/m2・day 410 860 4500 1100
Water bearing pressure kPa 80< 80< 80< 80<
Composite material (nonwoven fabric) PET nonwoven fabric(30g/m2) Nylon nonwoven fabric(40g/m2) PET nonwoven fabric(30g/m2) PET nonwoven fabric (black)(50g/m2)



Disposable adhesive heating pads

Dehumidification agents, air fresheners


  • Store away from direct sunlight, in a well-ventilated area at room temperature with normal humidity.
  • For quality and safety in various applications, please fully confirm compatibility with your products before use.
  • Long-term use under severe conditions may lead to deterioration. Once the product is delivered, please use it within the term of guarantee.
  • This data sheet provides product measurement values under certain conditions only. These values are not guaranteed in every circumstance.
  • The quality, performance, and functionality of this product will differ depending on your conditions of use. For details, please contact our products division.
  • Manufacturing of this product may be halted, or its specifications may be altered, at any time without prior notice.
  • Intellectual assets related to this text are held by Nitoms, Inc. If this text is to be used for reasons unrelated to the purpose intended by our company, please contact our products division to discuss it in advance. Unauthorized copy or reproduction of this text is strictly prohibited.
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