The Park Ave indoor Rabbit Hutch is an upgraded solution to housing your rabbits or small animals. A non-toxic solution. Houses 2-3 rabbits comfortably. Two levels of fun for your bunny. Clear, polycarbonate windows resist breaking. ecoFLEX is a proprietary formula that incorporates reclaimed wood and plastic into the material that allows the product to be eco-friendly and a great value as it will outlast most other products. ecoFLEX is 100% non toxic and does not absorb moisture. There is nothing in ecoFLEX that could harm your pets. Easy no tools assembly.