I bought this tent for my 120 inch sofa(I got a family L size). 
Actually I bought a tent from another Korean brand for my bed 3 weeks ago, but the fabric of the tent is thin and does not fit my eastern king size bed.  
So my husband and I decided to get another brand and found this brand. 
We got a tent for our sofa first. 
It is much thicker, has a fantastic design, great quality and even has a greater variety of sizes compared to other brands. 
If you have kids they will love it!!  
It helps you keep warm while you are sleeping;
no more catching a cold and a blooding nose (due to dryness).
 It is good for using a small humidifier or hanging a wet towel inside of the tent.
Also, the fabric part can be laundered!! 
You can keep the tent clean. 
I will definitely be buying another for my bed.