if its outside I would opt for a thick layer of newspaper and then absorbant bedding on top of that and then add a load of hay on top of that (I put A LOT of hay in their bed). The newspaper will help soak up any wee and adds a layer on insulation to the hutch. I have just stopped using megazorb as my last bale was very dusty and had an odd smell, also as its so fine it is a pain in an outdoor hutch, gets kicked everywhere and then blows all over the garden (especially on clean out day) and makes a huge mess.
I use ecobed (which is squares of cardboard) or finacard which is similar or there are a number of other absorbant bedding materials such as fitch or even good quality dust extracted wood shavings. On top of that they have a load of hay (lots in their bed) to burrow into. Remember that you will want to think about keeping them warm outside. I have used fleece inside but outside in a hutch I personally wouldn't use it. I roll everything up in the newspaper and just chuck it on our garden waste bin - Easy!
