Polyurethane foam blocks can be used in athletic venues such as gymnastics foam pits or as padding for extreme sports. Other uses for these foam cubes can be cushioning for packing materials. These foam blocks come in a variety of sizes, have a tensile strength of 15 PSI, and a 250% stretch limit. They can also hold their form in a temperature range between -20 degrees F to 180 degrees F. Aside from small and large foam blocks we also carry foam sheets which are great for wall or floor padding, and foam balls for material padding or sporting purposes.