Differences between regular tents and ultralight tents: (1) Ultralight tents are more for backpacking, so they only fit 1-2 person. Regular tents can have up to 4 people. (2) Most ultralight tents are made of Nylon because of their high flexibility, stretchability and lightweight, while regular tents are made of polyester. (3) Ultralight tents are for 3 and 4 seasons and are compatible with mild snow, while regular tents are only for 3 seasons and not compatible with snow. (4) Both types have double layers, but ultralight tents are more compact than regular tents. (5) Ultralight tents are lighter in both total pack weight and minimum trail weight.