I use a Tarptent Moment DW one person tent (ripstop inner tent. There is a floored netting inner but I use mine for 4 season camping. I want to keep spindrift snow out.
It weighs 30 oz. and another 10 oz. for an optional crossing pole to support the fly better against snow load and wind.
This tent is fast to set up, needs only a small footprint, has 2 vestibules and doors, great ventilation that can be adjusted and is very high quality. You can easily sit up in it.
It's about the lightest solo tent I could find for 4 season camping. It's my 3rd Tarptent because I like their designs, quality and customer service.
I have a 2 peerson Scarp 2 that, like my Moment DW, I have "winterized" by shortening the X-ing poles a bit and running them inside the fly. To see what this looks like and how easy it is to do go to the Backpacking Light site and search for these two tents. My threads will come up.