One of these came on a used trike I just purchased:

http://www.hostelshoppe.com/cgi-bin/readitem.pl?Accessory=1161448133

Makes a great fart sound when first sitting down, but the extra padding is nice,
and it does help prevent shifting/sliding towards the pedals over time.

Mark

--- In actionbent@yahoogroups.com, "Nigel Duxbury" <duxbury@...> wrote:
>
> Hey, I found this product that may interest those who get recumbum. I've been
using one of those hemorrhoid doughnuts to keep my butt comfy on long rides.
It's a cheap and effective way to prevent pressure pains caused by sitting for
long periods of time; however, it is a little unconventional and slightly
embarrassing. A friend gave me a small sample of an air filled cushion that is
used primarily on wheel chairs etc. The company is called The Roho Group
http://www.therohostore.com/Departments/Comfort-Products/AIRHAWK-Motorcycle-Seat\
-Cushions.aspx
>
> Please let me know what you think. Nigel
>