Re: Boat cushions
We bought the Bottomsiders small back cushions to sit on in the cockpit. For about $60 we now have these supremely comfortable low profile (I think about 1.5 inches) high density foam "butt pads". They are slightly "tacky" so dont fall off the seat when we change sides, unlike other cushions we have had. I like them so much I am almost tempted to buy the full length ones but they are very pricey and would be a big investment for our little boat. They can get fitted with pop studs by the manufacturer to keep them in place if you want.
On non sailing days we put the cushions in our kayaks and enjoy them there too.