They're the only sposie I know of that doesn't have any of the chemical gel **** in them at all; even most eco-disposables attain at least some portion of their absorbancy through this gel. Tushies are all cotton, I think, inside. We used them during an international journey of 36 hours last summer (2005) and had no leaks, and they are possibly less horrid than most sposies, but still pretty papery and ick to a devoted cloth mama. We've found ways, since, even on long trips, to avoid using anything but our cloth, but if I absolutely had to use a sposie, I would use this brand again to avoid the chemical gel all of the others contain.