You may want to make a list of what "threats" [rain, sun, wind, insects, rodents/"varmits"(four and two legged varieties), temperature extremes, etc.] need to be handled by one of these (fabric?) structures.
Then evaluate the likelihood of having each event/threat happen in the location in which you plan to use the shelter.
My signature used to include a link to my personal web-site - - - however: