Testimonials |
"Thanks for making another fantastic product that keeps me warm and comfortable. I love my new Toasty Feet inserts, they keep my feet warm as Toast!"
Martha Wineoski, Chicago IL
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"I have loved my Exchanger Mask for the past 3 years and now I also love my new Toasty Feet. It is amazing how warm my feet are now in my normal day shoes. I always have had cold feet during half the year but now I can walk around my house with warm feet."
Barbara Johnson Smithtown, NY |
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News |
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Aerogel is not like conventional foams, but is a special porous material with extreme microporosity on a micron scale. It is composed of individual features only a few nanometers in size. These are linked in a highly porous dendritic-like structure.
This exotic substance has many unusual properties, such as low thermal conductivity, refractive index and sound speed - in addition to its exceptional ability to capture fast moving dust. Aerogel is made by high temperature and pressure-critical point drying of a gel composed of colloidal silica structural units filled with solvents. |
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Aerogel is the lightest and lowest-density solid known to exist. It is typically 50-99.5% air, yet can hold (theoretically) 500 to 4,000 times its weight in applied force. Aerogel can have surface areas ranging from 250 to 3,000 square meters per gram, meaning that a cubic inch (2.5 cm x 2.5 cm x 2.5 cm) of aerogel flattened-out (again theoretically) would have more surface area than an entire football field! Aerogel’s superlow density makes it useful as a lightweight structural material, and its superhigh internal surface area makes it a superinsulating solid material. For those of you who have always wanted to touch an aerogel, it feels like styrofoam. Silica aerogel is transparent with a blue color. |
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The pore structure of silica aerogels is difficult to describe in words. Unfortunately, the available methods of characterizing porosity do only a slightly better job. The International Union of Pure and Applied Chemistry has recommended a classification for porous materials where pores of less than 2 nm in diameter are termed “micropores”, those with diameters between 2 and 50 nm are termed “mesopores”, and those greater than 50 nm in diameter are termed “macropores”. Silica aerogels possess pores of all three sizes. However, the majority of the pores fall in the mesopore regime, with relatively few micropores.
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