Aerotherm® thermal insulation harnesses the unique properties of Aerogel which is the main component of Aerotherm®. This cutting edge technology will protect you from extreme hot and cold weather conditions.

Composed of over 90% air, aerogel is a highly effective insulator with the lowest thermal conductivity of any solid; Aerotherm uses silica aerogel in producing a strong, durable, and flexible material that is 2 to 8 times more effective than traditional thermal insulation.

Advantages of Aerotherm®:

  • Highest thermal performance
  • Minimum thickness, which allows a thinner design with superior thermal performance
  • Loft not required to maintain insulating power
  • Doesn't compress or lose performance under a load
  • Waterproof, even at high temperatures
  • Maintains thermal conductivity in wet conditions
  • Durable in a normal wash/dry cycle

Aerogel is created when silica is gelled in a solvent. When the solvent is removed, "puffed up" sand with up to 99% porosity remains. Nanoporosity slows heat and mass transport, which makes Aerogel an effective insulator; it also has the lowest thermal conductivity of any solid. This strong, flexible, durable material is 2 to 8 times more effective than traditional thermal insulation.


Aerogel Thermal Conductivity vs. Other Materials

  Thermal conductivity
(mw/m-K)
Aerogel 13
Polyurethane Foam 24-30
Polystyrene Foam 33-35
Fiberglass 38-42
Lofted Polyester Apparel Insulation 38-47

Other materials require loft to achieve their insulation value, but pressure causes them to compress dramatically and lose their loft along with their insulating capacity. Aerotherm® barely compresses and doesn't need loft to deliver its high insulation value. Only a 2mm thick layer of Aerotherm® is enough for effective apparel insulation; footwear insulation typically uses 3mm.

At 15 psi pressure, Aerotherm® retains over 95% of its original thickness and over 97% of its original thermal performance.

The breathability rating is a measurement of vapor movement through the material, and is displayed as the grams of water that move through a square meter of fabric in a 24 hr period (g/m2/24hr). Take this breathability rating as a guideline, with a grain of salt, because lab testing results for breathability vary greatly and don’t always reflect real-world performance.