3-Person Tent. I previously owned this same model tent and bought this second one but never used it! It can fit a full-sized inflatable mattress in it (which I am also selling -- slightly used - $10) as well as a medium sized duffle.

It is this model that I bought for $66.
https://www.amazon.com/gp/product/B002PAT60S/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1