well I just want to add, i am currently trying to switch to fleece, after washing my fleece 3 times as advised, i lined my cage with towel and top layer fleece, it wasnt working properly and it stank within 24 hrs I bought more fleece tried again changing washing powder, and changed the fleece over, no sooner had Poppy wee'd it just sat there, and she was ringing wet and stunk of urine, I pulled everything out bathed Poppy and am back on shavings at the moment, I have since washed all the fleece's about another 5 times and now by checking with water the water is starting to go through. So before you line your cage I would recommend checking it with a cup of water to see if it is going through, if it just sits on the top it still has some water barriers in place and will not work, also check the towels you use, I found that the big fluffy towels seem to asorb water fast, a short threaded towel the water just sat there. I am still inteading to give it another go, but am going to make sure the water is running through the fleece really well before using in my cage again, I dont want my Poppy sitting in her urine again.