This is a handmade item. It's a roomy fit for Djungarian hamsters, and a snug fit for Golden hamsters. If you have multiple Roborovski hamsters, you might see a cute scene...⸜(*˙꒳˙*)⸝ Material: 100% polyester We do not provide any guarantees regarding allergies, accidental ingestion, injuries, or accidents. Please monitor your pet and take measures such as removing the item if you feel it poses a danger. (We are also not responsible for any issues that may arise from this.) Please understand this before purchasing. m(_ _)m