As if she hasn't enough padding already (heaven help me if she reads this!) SWMBO is finding the shell seats (despite some neoprene padding) too harsh.
Any suggestions as to what foam and density we could put in for her occasional trips in it (preferably removable)?
Thanks, Pewe

just get her to sit on a pillow or similar

What you need is memory foam.

While under no circumstances show her this ebay item this is what you want (work safe!)

http://cgi.ebay.co.uk/MEMORY-FOAM-CUT-TO-SIZE-DOG-PET-BED-1-SQ-FT_W0QQitemZ300325400992QQ

I believe NASA use it on the chairs of the shuttle so it's probably the best stuff for the job.

Second the memory foam idea................... or stock up on pies - take your pic!!

PS i'd go with the foam if i was you!!!

tesco sell outdoor chair cushions for £2 - the 'locost' solution

When I borrowed my brother's Xflow Fury for five days driving round ROI / N. Ireland I had to take the seat out to fit in. I ended up buying a cushion (asdas cheapest!) and sat on that for the next few thousand miles. Not that uncomfy either...

An issue for my SWMBO as well. the shell seat is just not wide enough for her. She has to sit in it at an angle and it's not to comfy for her. Shame as she likes going for a blat in it.

Thanks guys. Memory foam looks worth a try.
Cheers, Pewe