For those who've cared to listen I've had a big issue with the comfort of the driver's seat in my Prius. I've been looking for a seat bottom cushion, preferably of the heat sensitive foam type for several months, but no one seems to make anything quite like I wanted. The other day I came across something in the Sharper Image http://www.sharperimage.com catalog. It is a seat 'back'/lumbar support pillow made of the heat sensitive foam. But I thought the shape looked exactly like what I've been looking for. Sort of a long tear-drop shape to be thicker in front for thigh support and thinner at the back so as to not raise me up too much and to accentuate the thigh support. Anyway, the item is Item Code ME810 Heat-Sensitive Foam Back-Support Pillow http://www.sharperimage.com/us/en/catalog/...&catid=43480500 It is about $70 (+shipping if you don't have a Sharper Image locally to go to, + Tax) I had a $10 off code at the time so it came to right at $70. It could be a little wider and maybe a little longer (~3" longer and 4" wider would be ideal), but shape is nearly perfect. As it is it offers great thigh support, molds to your butt and legs after about 3-5 minutes and is quite comfortable, I didn't have to do any major leg shifting to remain comfortable. It does raise you up in the seat a bit so I had to adjust the mirrors, but for me it also increased the distance to the pedals slightly, which was a plus. It is also only available in gray. I can deal with that and I think those with gray interiors will find it perfect, but it does stand out. I'm hesitant to make a cover for it both b/c it would be difficult to make it fit nicely and also b/c as it is it doesn't slide around much, the cover material is very similar in texture to the upholstry in the Prius. I'm very very pleased because the leg comfort was such a major issue for me and b/c appearance is a secondary issue. If someone made a custom fitted cushion for the Prius seat I'd probably buy it, esp. if the color/material was the same as my Ivory, but for now this is a perfect solution for me.