Squidgy's an indoor bun, and he has fleec pet blankets in his hutch, and carefresh in his litter tray.
The outdoor buns just have hay in their hutches and wooden cat litter pellets in their litter trays, coverd with a layer of hay.
Woodshavings are generally thought not to be too good for respiratory systems. Some people use shredded paper, megazorb - lots of options really!