:? I don't know about in US but in UK certAin things can be very overpriced (not expensive but worth the money Plain extortion lol) so I made one and I am passing the tip on :-) I have put it in chronic pain as I am guessing that's where most people will see it :-)
Right, what am I talking about? I'll tell u;-). We all sit down yes? And due to pressure on the spinal cordf etc end up stiff and in pain?? You can buy special cushions with a "cut out" section under the cocxis(bad spelling) thus allowing the spinal cord to float in a suspended neutral pressure free position! No more painful sitting (from pressure on spine)
HOW? Get a square of foam at least 7cm thick and on one side cut out a semi circle so that it is central and inline with ur cocxis (make square same size of seat used) make a cover if u like (I just use a pillow case) and away we go!!
Honestly guys if u haven't tried one then please do- I can guarantee it will make sitting for work/craft more of a pleasure and less of a pain!!!
Try it - sarah