It would tend to retain moisture where your ripstop tends to dry quicker. Heck, I've got bluejeans going for another turn in the dryer right now. See I got an intelligent dryer that by act of congress decides exactly the right moment to shut off leaving the fabric just moist enough to go straight into mildew. Gotta hit it with Odoban after that if you CAN get the mildew out.
At SPADfest this year, when I would get up, because of the close proximity of my Superfly my hammock would receive a nice little rainstorm from the dew collected on the underside of my tarp. But it would be dry in no time. My cotten based blanket was dry after I hung it out in the sun for half a day.