An Englander Kios, I believe. Used for 3 years, always with a mattress cover, but I've moved to a smaller place in Berkeley, so I don't need it anymore. Cover and sheets included. Retailed at 800, yours for 100 since I just want to be rid of it.

Wear: Mattress slightly indented where I slept (see photo).

Details of the model: http://www.sixdaymattressstore.com/mattresses/size/queen/englander-tension-ease-kios-mattress-queen-7364-q.html

For more information, see the craigslist post: https://sfbay.craigslist.org/pen/fuo/6136104274.html