Anything `wood` based will probably have a scent to it, so the best thing to do is smell it close up. If you feel it smells strong to your nose, don`t use it. They are all good at saying their products are dust free and safe. Try using Carefresh..... :roll: one of the worst. I would`nt put that stuff near my mice again. I can`t say if this new substrate you have is good or not as I`m in the UK and have never heard of it. But shredding newspaper is probably a safer bet until you can get Aspen again. Just use thick newspaper on the cage floor aswell as it`s absorbent, although you should change a few pages daily to prevent damp and small building up.