The Theta 4 from Portal Outdoor is currently not available on Amazon, but two things can be gleaned from the predominantly very positive reviews: The tent is really spacious and the 3,000 mm water column will keep you reasonably dry when camping, even in severe storms or three days of rainy weather survive. The winter resistance of this model is probably worse: According to some reviews, it is only really usable in the summer months. When camping in winter, due to the processing of the tent floor, it is quite possible that you will freeze, especially in the common area.