"Dave Van" wrote in message
link.net...

"PaddlingPair" wrote in message
...
Finally my wife surprised me with the Sealine
Thermorest thigh support. It is Wonderful and worth every penny (to me
at least) of the $40. It is infinitely adjustable and because it is self
inflating you don't have to take it out and blow it up!


Self inflating? What does that mean?

Assuming that it is the same as self inflating mattreses, the shell has some
sort of shape retention that "remembers" the shape it should be when filled.
As it expands from the tension of the material it sucks the air in through a
valve. When it is full then you close the valve so the the air does not
escape when your weight puts pressure on it. To deflate you open the valve,
squeeze the air out and shut the valve before the air can get sucked back
in.