If you don’t know how to roll cones or simply want pre rolled there are many different variants here with included filters to choose from. It’s mainly the sizes that vary where there is everything from the more normal sized cone to the “family size” which holds huge amounts of herbal mixture, but there are flavoured variants as well. You just fill them up with the herbs of choice and pack them lightly before putting it on fire. Usually they consist of e.g. cellulosa, glycerin and water and as a rule they all originate from natural sources. You can see a comparison of the standard sizes here.