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HoMagic® aerogel fiber takes this technology and makes it practical for filling material and clothing. The aerogel particles are integrated into flexible fibers that can be woven or layered into fabrics. While down’s effectiveness depends heavily on staying dry and maintaining loft, aerogel fiber’s nanoporous structure works consistently.
The science behind aerogel fiber sounds complex, but the concept is straightforward. Aerogel itself is sometimes called “frozen smoke” because it’s mostly air held in place by an incredibly fine silica structure. Each fiber contains billions of nanoscale pores that trap air more efficiently than any natural material. This structure gives aerogel fiber a thermal conductivity of just 0.017-0.020 W/m·K, which is actually lower than still air itself at 0.026 W/m·K. That’s not a typo—aerogel fiber insulates better than air alone.
