you wash it????
Foam
Instead of purchasing a complete cushion made out of memory foam, it is possible to add one or two memory foam toppers to a regular foam cushion. This will give the support but will not be as hot or as prone to permanent indentations as memory foam.
to make a nice cushion
Memory foam car seat cushion information can be obtained from a medical website such as www.webmd.com or www.drugs.com. These cushions are used to ease back pain and tension.
To cushion the joints, it is a good idea to use cushioned chairs when sitting and foam kneeling pads for the knees.
Drink the foam
Aphrodite doesn't have a dad, she rose from the sea on a cushion of foam.
All the metal components should withstand extreme heat; as for the foam seat cushion, I wouldn't expect much.
For indoor sofas/couches, loveseats and chairs, you want something you can "sink" into a little bit, but something that will last for years, as well. A cushion filler with Memory Foam is your best bet.
This is close to lightning: Static Rub foam onto a carpet and then remove the foam sllllllloooowwwwllllllllly. I really mean it; remove it really slow.
The battery is located under the rear seat cushion. "How easy is it?" As far as I'm concerned, it's easier than the underhood mounted battery because there is no engine grime / underhood dirt to deal with. Pull up the rear seat cushion by grabbing it at the biteline (where the seat foam and back foam meet - where the seatbelts appear to come out of the seat), pull forward and then up. Remove the seat cushion and there's the battery. Undo the battery tiedown and disconnet the cables. reverse the order when the new battery is in. When replacing the seat cushion, be sure the two metal tabs go into the slots on from the seat cusion frame to the seat base before pushing the biteline back into its proper position.
There are many online retailers which sell foam cushions. If you look on sites like eBay and Amazon you should easily find what you are looking for. A search of the high street could also be very useful.