Wood Shavings
Most people choose a main substrate that you can buy in bulk relatively cheap. As a result, Allspan and Chipsi Classic are the most popular choices. No matter what, ensure the wood shavings are Aspen, Birch, or Spruce; these are safe for hamsters. Wood shavings are a great choice because of their natural properties. Once wood shavings are compacted, it is easy for hamsters to build burrows.