Honestly, I had low expectations of this product but having had some desperate moments in the van decided to give them a go. Put off using them because I didn’t want to poop in the van (we have a little portaloo but strictly pee only in it) but nature dictated that I had no choice. I was amazed- no smell and the magic material just absorbed everything. No idea how it works, but it does. I would not want to be without them now – still only for desperate situations but so useful. Highly recommend