Sleeping quarters for a pet having a flat bottom and arched roof framework with two pen ends and made of lightweight, semi-rigid foam material. A tubular liner having a transversely extending elastic strip sewn to longitudinal gathers is inserted through the open ends of the framework and the ends are folded back onto the framework and held by elastic bands. The interior of the tubular liner of fabric material is resiliently expandable to snugly engage the pet which crawls into the sleeping quarters. An alternate embodiment shows a fully folded portable sleeping quarters structure with two open ends and made of light weight, semi-rigid foam material. This alternate embodiment allows the frame to be expanded to accommodate different sizes of pets. Moreover, a tubular liner having a transversely extending elastic strip sewn to longitudinal gathers is inserted through the open ends of the framework and the ends are folded back onto the framework and held by elastic bands. The interior of the tubular liner of fabric material is resiliently expandable to snugly engage the part which crawls into this portable and expandable sleeping quarters.
