Abstract: Embodiments of the present disclosure relate generally to transportation containers and assemblies, such as transportation containers and assemblies for containing and transporting radioactive material. A transportation assembly for transporting radioactive material generally includes an outer container defining an inner cavity, the outer container having an inner shell, wherein at least a portion of the inner shell includes a plurality of layers including at least one layer of chopped fiberglass mat and at least one layer of aramid fabric. The transportation assembly may further include an inner container disposed within the inner cavity of the outer container.