: A friend of mine and myself are building a couple of guillemot kayaks.
: We are getting to the point of building the seats or buying. The problem
: is He has a problem with his legs falling asleep every time we paddle any
: of my plastic boats or my glass boat. Every seat is different and every one
: he has the same problem, Does anybody have any idea's , first why does he
: have that problem and I never do. And is there any seats that are better
: for a stripbuilt boat.

I have a friend with the same problem. He's concluded that the seats with a more pronounced lip at the back of the thigh cause some sort of nerve or circulatory impingement. (aka the "Too Long on the Toliet" effect). Your friend might find some relief by custom grinding a foam block into a shape that doesn't put pressure on the back of the thighs.

Jim