Abstract: A multi-season, reversible tent adapted to accommodate prevailing solar conditions. Selected walls are constructed to include insulated liners and solar reflective and absorptive surfaces which cooperate with a longitudinal access opening. The walls assemble to an irregular triangular shape and can be reversed to optimally collect and reflect solar and thermal radiation in relation to one or more occupants and the prevailing conditions. Zippered reliefs at the door control the solar exposure of the wall surfaces and facilitate entry and egress. Multi-section, shock corded, end support frames are permanently contained at hemmed edges of the end walls. Adjoining pole ends are hinged to one another and longitudinal poles extend between eyelets at the hinge joints. Removeable cover, screen and window panels are supported to the door periphery. Rotating vents with overlapping apertures control interior temperature.