Antipill and blizzard fleece is always the safest fabric to use. If done correctly cotton and flannel can be used. We would recommend that you go to someone that specializes in making cage sets specifically for sugar gliders. Please do not buy pet store ferret bags. These have artificial sheep’s skin in them. It may look soft and comfortable for your gliders but has loose thread fabric and could potentially harm your glider by them getting snagged on this material.