People who feel cold in their knees while working or relaxing can take heart. Again the USB port of our computer comes to the rescue. After gloves and shoes, we now have pads for the knees. Vavolo has introduced knee pads that can be connected to the USB port. This warms up the knees and relaxes a person.

Product features
a. This knee pad can be connected to the computer.
b. The USB port of the computer generates heat for the warming pads.
c. It helps in frosted knees.
d. However, one can't walk when using this device.
e. It costs $25, to buy click here.
f. It can be used by people of all ages.
g. This is a very safe product.

Source: Techiediva.com