Paper Towel Instead of Hydro Blocks

i was wondering could i wrap my clones in a paper towel or something instead
of the regular hydro blocks and put them in a container with gravel or would the roats not be able to get through the paper towel or is their any way i can use something like that other thatn the blocks? just wondering.thanks.

not too sure, but maybe some peat pots...thats what i used, but not completely sure for hydroponics