100 years in the future the earth is ravaged by (pollution, nuclear tests, rockets, etc.) and the remaining people live in bubbles out in the desert under the auspices of some kind of police state.
From 1973, this may be the first post-apocalyptic-dystopian-society-in-the-desert-with-crazy-vehicles-and-outfits. So this film is truly groundbreaking. There were plenty of grim sci-fi tales from the early 70s, but this could be the first in that desert landscape.
Although obviously low budget, the sets and costumes are well thought out and work well given the limitations. The location is also chosen well, and the color of the outer robes makes sense when you see the rest of the film. Everyone needs to wear a breathing mask outside (army surplus, but it works) or after a (never really determined) period of exposure you'll die.
Under the robes, the women wear exceptionally sexy stringy things, when they wear anything, and the men wear only tight pants, when they wear anything. There's a lot of sex, violence, and post-apocalyptic doom and gloom, along with some well choreographed martial arts by both male and female characters. The fight scenes are really well done. The sex and violence (which are not too graphic) work into the plot given who are "good guys" and "bad guys" although there's also an underpinning of a totalitarian society.
It's thin on plot but does a good job of creating an overall sense of despair. The motivations of the characters in the bubbles (especially the sex) makes sense and there isn't always a bright line between "good guys" and "bad guys."
Sandy Carey and Uschi Digard are mostly known for porn/sexploitation, but this does transcend that genre. It clocks in a 75 minutes. There could be missing footage, but it seems complete enough. The stock footage of cityscapes, rockets, and nuclear tests is more distracting than helpful.
EDIT: the version shown on Tubi is cut by about 25 minutes and it adds the stock footage. It still works truncated like that.