Geography, ecosystems, life cycles, flora, and fauna. Natural World Carpets are full of possibilities for scientific inquiry and exploration as well as imaginative pretend play. These carpets encourage environmental awareness and enhance children's sensitivity to shared responsibility for our world and the plants and animals that inhabit it. These carpets feature commercial-grade construction: 100% 2-ply nylon with serged, double-stitched binding. The patented backing technology virtually eliminates wrinkling and creases, provides extra insulation and sound control, and increases overall comfort. Carpets also have antibacterial treatment and enhanced soil/stain resistance. Flammability rated to meet federal standard #NFPA253, Class 1 fire code requirements. 15-year limited wear warranty. 6' x 9'